4) Mr. Faisal borrowed Tk. 5,00,000 from Prime Bank Ltd. He is planning to repay the loan by equal instalments over 20 years. Annual interest rate of the loan is 12%. (5) a) Calculate quarterly and monthly loan payments if payments are made at the end of each period. b) Calculate quarterly and monthly loan payments if payments are made at the beginning of each period. c) Why the calculations in part a are different that of part b