To complete this assignment, run the following command to install the korn shell: If you want launch the korn shell to test some commands, run the following command: To return

To complete this assignment, run the following command to install the korn shell: If you want launch the korn shell to test some commands, run the following command: To return to you default shell type: Write a korn shell program that will continually allow the user to input a numeric average for a number of students. After each grade is input the program will output the letter grade for that student. It will continue to ask for more grades until the user enters -1 to stop. Once the user enters -1, have program output the numeric average for all students. A sample run could be: