Changes

# [https://www.answertopia.com/android-studio/java/save-and-restore-android-activity-state-in-java/ Saving and Restoring the State of an Android Activity]<br><br>

# [https://www.answertopia.com/android-studio/android-views-view-groups-and-layouts/ Understanding Android Views, View Groups and Layouts]<br><br>

# [[A Guide to the Android ConstraintLayout]]<br><br>

# [[A Guide to using ConstraintLayout in Android Studio]]<br><br>