1. a. Declare a enum datatype named standingType b. Initialize the list with the following values: FRESHMAN, SOPHMORE, JUNIOR, SENIOR c. declare a proper enum variable d. write a SWITCH statement using the declared enum variable to output (cout) the following: If the value is FRESHMAN, output "O-29 credits earned" if SOPHMORE, output "30-59 credits earned" if JUNIOR, output "60- 89 credits earned" if SENIOR, output "90 or more credits earned", if none of the above, output "Invalid Input. Be sure the code does not FALL THROUGH to the next statement; Be sure to include a statement that will take care of an invalid value assigned to the variable