Add the choice of a background color to the settings activity. Create a couple of new color resource in color xml. Add these choices as a RadioGroup to the settings screen. You will have to modify the layout to place all the RadioGroups in a ScrollView so that you can see them all. Make the choice persist in a SharedPreferences object. Use the following command in the onCreate method of the setting activity to set the chosen background color: scrollviewobject. setBackgroundResource (R. color. colorresourcename): Create a method in ContactDatasource that will only update the Contact's Address. Create a ContactAddress object to pass data to the method. Modify the Contact table to include a field BFF that is an integer data type. Modify the onUpgrade method of ContactDBHelper to insert this new field without losing the data that is currently in the table.