$(3)$ Implement the execute$\_$menu$()$ function that takes $2$ parameters: a character representing the user's choice and the user provided sample text. execute$\_$menu$()$ performs the menu options, according to the user's choice, by calling the appropriate functions described below. $(1$ pt$)$

$(4)$ In the main program, call print$\_$menu$()$ and prompt for the user's choice of menu options for analyzing$/$editing the string. Each option is represented by a single character.

If an invalid character is entered, continue to prompt for a valid choice. When a valid option is entered, execute the option by calling execute$\_$menu$().$ Then, print the menu and prompt for a new option. Continue until the user enters $\text{'}$q$\text{'}.$ Hint: Implement Quit before implementing other options. $(1$ pt$)$