1. The prompt: Type (E)ncrypt/(D)ecrypt : a. The user will type E or D. We will assume in this assignment that the user can type an E or D correctly. No validation is necessary. b. Your program will accept that character, must store it in x3100, and use it, as we shall see momentarily. 2. The prompt: Enter encryption key (1-9): a. The user will type a single digit, from 1 to 9. We will assume in this assignment that the user can hit digit keys on the keyboard correctly. No validation is necessary. b. Your program will accept this digit, must store it in x3101, and use it to encrypt or decrypt the message. 3. The prompt: Enter message: a. The user will input a character string from the keyboard, terminating the message with the key. We will assume in this assignment that the user can hit digit keys on the keyboard correctly and enter the correct number of characters. No validation is necessary. b. Your program will store the message, starting in location x3102.