A student takes out a loan of $1,200 at the beginning of each semester (semi-annually) for 9 semesters to pay for college. The loan charges 4.2% interest compounded semiannually. The student graduates after the 9 semesters and refinances the loan to a lower 3.5% rate compounded monthly with monthly payments (made at the end of each month) for 120 months. Find the monthly payment and the total interest paid.