GPA Calculator that asks for if the user wants to enter a course, if yes then an input of a course will need to have the first 3 characters uppercase and the last 4 characters between 1000-9999 e.g. DAT5900. After entering the course code, a prompt for the grade will pop up and the value needs to be 3-7 or 1.5. After the user enters the two details, the prompt will loop to the first question and if the user says no to entering more information, the gpa is displayed. How would I make this?