You are required to write a Bourne Again Shell Script (bash) to manage a menu driven program. When executed the user should be presented with a menu with 4 (four) options: 1. Print the following user information: the home directory, print files and folder in column format, user id, login shell together with the current date and time. 2. Write a bash script program that reads a set of positive integer numbers until a sentinel value is entered. Enter 99 as the sentinel value to terminate the loop. The idea of a sentinel controlled loop is that there is a special value (the "sentinel") that is used to say when the loop is done. In this example, the user will enter -99 to tell the program to terminate the loop. 3. Print out the sum, the highest number and the lowest number of the entered numbers. 4. Exit the program.