Write a single shell script hello. sh which can finish the list of tasks as below: 1. Greet user. E. g. Welcome to computer science society. 2. Contain a comment section with your name and email address. 3. Print a menu as below: Choose the item you want to buy? A. Apple Price: $1 per each B. Banana Price: $0.5 per each C. Orange Price $0.8 per each 4. Print the date(MM/DDA) after message "Purchase date:"5. Print out the current working directory. 6. List the total number of sh files in your home directory. 7. Print the values of variables HOME, PATH, USER and SHELL 8. List the PIDs of running processes associated to your account 9. Print if x > 2; y= x*2; else y =y/2; 10. Print "Good bye..." followed by the first argument from the command line.