Please write in assembly language

Phone keypads

Problem Description:

The international standard letter/number mapping found on the telephone is shown below:

1	2 ABC	3 DEF
4 GHI	5 JKL	6 MNO
7 PQRS	8 TUV	9 WXYZ
	0

Write a program that reads a letter and displays its corresponding digit.

Analysis:

(Describe the problem including input and output in your own words.)

Design:

(Describe the major steps for solving the problem.)

Testing: (Describe how you test this program)