Problem

(Phone keypads) The international standard letter/number mapping found on the telephone...

(Phone keypads) The international standard letter/number mapping found on the telephone is:

Write a method that returns a number, given an uppercase letter, as follows:

Write a test program that prompts the user to enter a phone number as a string. The input number may contain letters. The program translates a letter (upper- or lowercase) to a digit and leaves all other characters intact. Here is a sample run of the program:

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Solutions For Problems in Chapter 9

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