diff --git a/exercises/concept/annalyns-infiltration/src/main/java/AnnalynsInfiltration.java b/exercises/concept/annalyns-infiltration/src/main/java/AnnalynsInfiltration.java
index 97a724d39..6d5bb7d84 100644
--- a/exercises/concept/annalyns-infiltration/src/main/java/AnnalynsInfiltration.java
+++ b/exercises/concept/annalyns-infiltration/src/main/java/AnnalynsInfiltration.java
@@ -1,17 +1,21 @@
 class AnnalynsInfiltration {
-    public static boolean canFastAttack(boolean knightIsAwake) {
-        throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canFastAttack() method");
+    public static boolean canFastAttack(boolean knightIsAwake){
+        // throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canFastAttack() method");
+        return !knightIsAwake;
     }
 
     public static boolean canSpy(boolean knightIsAwake, boolean archerIsAwake, boolean prisonerIsAwake) {
-        throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canSpy() method");
+        //   throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canSpy() method");
+        return ((knightIsAwake || archerIsAwake) || prisonerIsAwake);
     }
 
     public static boolean canSignalPrisoner(boolean archerIsAwake, boolean prisonerIsAwake) {
-        throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canSignalPrisoner() method");
+        //   throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canSignalPrisoner() method");
+        return !archerIsAwake && prisonerIsAwake;
     }
 
     public static boolean canFreePrisoner(boolean knightIsAwake, boolean archerIsAwake, boolean prisonerIsAwake, boolean petDogIsPresent) {
-        throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canFreePrisoner() method");
+        //     throw new UnsupportedOperationException("Please implement the (static) AnnalynsInfiltration.canFreePrisoner() method");
+        return (prisonerIsAwake && !archerIsAwake && !knightIsAwake) || (!archerIsAwake && petDogIsPresent);
     }
-}
+}
\ No newline at end of file
diff --git a/exercises/concept/bird-watcher/src/main/java/BirdWatcher.java b/exercises/concept/bird-watcher/src/main/java/BirdWatcher.java
index c19dd38e6..23efc7b8f 100644
--- a/exercises/concept/bird-watcher/src/main/java/BirdWatcher.java
+++ b/exercises/concept/bird-watcher/src/main/java/BirdWatcher.java
@@ -7,26 +7,55 @@ public BirdWatcher(int[] birdsPerDay) {
     }
 
     public int[] getLastWeek() {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.getLastWeek() method");
+        //  throw new UnsupportedOperationException("Please implement the BirdWatcher.getLastWeek() method");
+        int[] birdCount = new int[] {0,2,5,3,7,8,4};
+        return birdCount;
     }
 
     public int getToday() {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.getToday() method");
+        //  throw new UnsupportedOperationException("Please implement the BirdWatcher.getToday() method");
+        return birdsPerDay[birdsPerDay.length-1];
     }
 
     public void incrementTodaysCount() {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.incrementTodaysCount() method");
+        ///   throw new UnsupportedOperationException("Please implement the BirdWatcher.incrementTodaysCount() method");
+        birdsPerDay[birdsPerDay.length-1] += 1;
     }
 
     public boolean hasDayWithoutBirds() {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.hasDayWithoutBirds() method");
+        // throw new UnsupportedOperationException("Please implement the BirdWatcher.hasDayWithoutBirds() method");
+        boolean noBird = false;
+        for(int count : birdsPerDay){
+            if (count == 0){
+                noBird = true;
+            }
+
+        }
+        return noBird;
     }
 
     public int getCountForFirstDays(int numberOfDays) {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.getCountForFirstDays() method");
+        //  throw new UnsupportedOperationException("Please implement the BirdWatcher.getCountForFirstDays() method");
+        int getTotalCount=0;
+        if(numberOfDays>birdsPerDay.length){
+            numberOfDays = birdsPerDay.length;
+        }
+        for(int i=0;i<numberOfDays;i++){
+            getTotalCount += birdsPerDay[i];
+        }
+        return getTotalCount;
+
     }
 
     public int getBusyDays() {
-        throw new UnsupportedOperationException("Please implement the BirdWatcher.getBusyDays() method");
+        //     throw new UnsupportedOperationException("Please implement the BirdWatcher.getBusyDays() method");
+
+        int busyDays=0;
+        for (int count : birdsPerDay){
+            if(count >= 5) {
+                busyDays++;
+            }
+        }
+        return busyDays;
     }
-}
+}
\ No newline at end of file
diff --git a/exercises/concept/squeaky-clean/src/main/java/SqueakyClean.java b/exercises/concept/squeaky-clean/src/main/java/SqueakyClean.java
index c56787fab..2a8d51751 100644
--- a/exercises/concept/squeaky-clean/src/main/java/SqueakyClean.java
+++ b/exercises/concept/squeaky-clean/src/main/java/SqueakyClean.java
@@ -1,5 +1,34 @@
 class SqueakyClean {
     static String clean(String identifier) {
-        throw new UnsupportedOperationException("Please implement the (static) SqueakyClean.clean() method");
+     //   throw new UnsupportedOperationException("Please implement the (static) SqueakyClean.clean() method");
+        int index =0;
+        String cleanString = identifier.replace(' ','_');
+        if(cleanString.contains("-")) {
+            index = cleanString.indexOf('-');
+            cleanString = cleanString.replace("-", "");
+            cleanString = cleanString.substring(0,index) + cleanString.substring(index,index+1).toUpperCase() + cleanString.substring(index+1);
+        }
+        char[] chars = cleanString.toCharArray();
+        String newString = "";
+        for(char c : chars) {
+            if(c=='4') c = 'a';
+            else if(c=='3') c = 'e';
+            else if(c=='0') c = 'o';
+            else if(c=='1') c = 'l';
+            else if(c=='7') c = 't';
+
+            newString += c;
+        }
+        cleanString = newString;
+
+        chars = cleanString.toCharArray();
+        newString = "";
+        for(char c : chars) {
+            if(Character.isAlphabetic(c)) newString += c;
+            else if(c=='_') newString += c;
+        }
+        cleanString = newString;
+
+        return cleanString;
     }
 }