A 10-year loan may be repaid under the following two methods: (1) amortization method with equal annual payments of X at the end of each year at an annual effective rate of 6% (2) sinking fund method in which the lender receives interest payments I at the end of each year at an annual effective rate of 7%. Also, at the end of each year, level deposits of D are made into a sinking fund which accumulates at an annual effective rate of j If X = 1 + D, calculate