In this lab you will write a program that simulates the dialing of a phone number. The phone number may have either digits, letters, or both. (See sample output below) Here are the letters associated with each digit.

0 5 J K L

1 6 M N O

2 A B C 7 P Q R S

3 D E F 8 T U V

4 G H I 9 W X Y Z

If the phone number entered does not have one of the valid digits or valid letters, display an error message. Write a method to convert the letter to a digit and to determine if it is valid.

A phone number never begins with a 0, so the program should flag an error if such a number is entered. Also a phone number never begins with 555, so the program should flag an error if such a number is entered. A phone number always has a hyphen (-) in the 4th position. Display an error message if it is not. If a hyphen is in any other position, it is considered an invalid digit and display an error message.

Use the switch statement wherever possible. Use Console.Read to input one character at a time from the keyboard buffer. Your output needs to look like mine.

Sample Output from Program - Each 3 lines is one run of the program.

Enter a phone number: s&i-oiem

Digit 2 is invalid

Press any key to continue . . .

Enter a phone number: asn-fgtr

Phone Number Dialed: 276-3487

Press any key to continue . . .

Enter a phone number: 0io-9876

Phone number cannot begin with a 0

Press any key to continue . . .

Enter a phone number: jkl-oiuy

Phone number cannot begin with 555

Press any key to continue . . .

Enter a phone number: asdfghjk

Digit 4 must be a hyphen

Press any key to continue . . .