private void addTutor() {
        try {
            System.out.println("Add Tutor:");
            System.out.print("Enter staff number: ");
            String staffNum = sc.nextLine();
            boolean isNewTutor = mrsb.isNewTutor(staffNum);
            if (isNewTutor) {
                System.out.print("Enter name: ");
                String name = sc.nextLine();
                System.out.print("Enter email: ");
                String email = sc.nextLine();
                mrsb.createTutor(staffNum, name, email);
                System.out.println();
                System.out.println("Tutor " + name + " has been successfully added!");
            } else {
                System.out.println("Sorry, this tutor already exists!");
            }
        } catch (Exception ex) {
            System.err.println("Caught an unexpected exception");
            ex.printStackTrace();
        }
    }