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Write a program that displays the following menu:
Menu
1. Count a letter
2. Eliminate a letter
3. Replace a letter
4. Exit
Enter an option:
The program prompts the user to enter a menu option (1, 2, 3 or 4).
Note: After processing any option, the menu is displayed again. The program runs continuously until the user selects option 4.
Option 1: The program prompts the user for a word and a letter; then displays the number of times that the letter is found in the word.
For example, if the word is banana and the letter is a, the output should be:
Letter a appears in word banana 3 times.
Option 2: The program prompts the user for a word and a letter; then displays the word without the letter.
For example, if the word is banana and the letter is n, the output should be: baaa
If the word is banana and the letter is x (there’s no x in banana), the output should be: banana
Option 3: The program asks for a word, a letter to be replaced, and the replacement letter. If the letter to be replaced exists in the word, all occurrences of it are replaced by the replacement letter.
For example if the word is banana, the letter to be replaced is a, and replacement letter is o, then the output should be: bonono
If the word is banana, the letter to replace is z, replacement letter is y, the output should be: banana
When your program is working, make it check that the user entered an integer instead of a real number or text . Then check that the integer entered is between 1 and 4. If the user types in an invalid entry, display an error message, and ask the user again.
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