detailed process if possible

4. John borrows 50,000 that is to be paid back over 8 years with level monthly payments at the end of each month. The interest is charged on the loan at a nominal rate of 9% compounded monthly. At the end of the 4th year, John decided to repay the loan in full with a single payment of X. Calculate X. (A) 29,450 (B) 30,060 (C) 30,570 (D) 31, 180 (E) 31,590