Write an Android phone program such that one instance of EditText, one in stances of Button, one instance of TextView, and another instance of EditText are displayed vertically on the AVD. The users of your program will be asked to input a positive integer in the first instance of EditText. When the users click the button instance, the product of integers from 1 to n will be displayed in the second instance of TextView and a triangular pattern consisting of $'s will be displayed in the second instance of the EditText. For instance, if n = 3, the prod- uct should be 6 and the pattern should be S$ $