private void addLecturer() {
        try {
            System.out.println("Add Lecturer:");
            System.out.print("Enter staff number: ");
            String staffNum = sc.nextLine();
            boolean isNewLecturer = mrsb.isNewLecturer(staffNum);
            if (isNewLecturer) {
                System.out.print("Enter title: ");
                String title = sc.nextLine();
                System.out.print("Enter name: ");
                String name = sc.nextLine();
                System.out.print("Enter email: ");
                String email = sc.nextLine();
                System.out.print("Enter office location: ");
                String office = sc.nextLine();
                mrsb.createLecturer(staffNum, title, name, email, office);
                System.out.println("Lecturer " + name + " has been added!");
            } else {
                System.out.println("Sorry, this lecturer already exists!");
            }
        } catch (Exception ex) {
            System.err.println("Caught unexpected exception.");
            ex.printStackTrace();
        }
    }