$3\mathrm{.}1$ SharedPreferences is a lightweight mechanism in Android used for storing small pieces of private data in the form of key$-$value pairs. It is suitable for storing primitive data types such as Boolean, float, int, long, and strings. Write an Android program that stores and retrieves a user$$s email and phone number using SharedPreferences. The application should have an GUI defined in activity.xml with two EditText fields: one for entering the email and another for the phone number. Additionally, include two buttons: one button to save the email and phone number into SharedPreferences and another button to retrieve and display the saved data using a Toast message.

In your MainActivity, create a suitable SharedPreferences object. Use the edit$()$ method to obtain a SharedPreferences. Editor instance. Store the email and phone number as key$-$value pairs using methods like putString$($Key$,$ value$)$ and save the data with commit$()$ when the $$Sace$$ button is clicked. When the $$view$$ button is clicked, retrieve the stored email and phone number from SharedPreferences and display them using the Toast.makeText$()$ method. $[25$ marks$]$