created selectCustomers() method, calculateRecommendations() method, and sharedPreferences

selectCustomers() changes the background color of buttons when they are
selected and stores variables that say whether or not a button has been
selected and how many from each group have been selected

calculateRecommendations() uses these variables to generate suggestions
for the user's business. The suggestions are stored in a list, which is
stored in Shared Preferences as a String delimited with ";"
created clearSuggestionList() method in SharedPreferencesUtility

this method is called in the onCreate of YourCustomers to clear any
existing SharedPreferences with the key "recommendation". If the user
navigates back to this page, the suggestions will be cleared.
applied styles to suggestions_for_improvement.xml

applied styles to this xml layout consistent with the others
implemented sharedPreferences in SuggestionsForImprovement

pulled the suggestions stored as a string in SharedPreferences and split
them at ";" by calling SharedPreferencesUtility.getStringList.

added these strings to the suggestionList