A 20-year loan of 20,000 may be repaid under the following two methods: (1) Amortization method with equal annual payments at an annual effective rate of 6.5%. (2) Sinking fund method in which the lender receives an annual efective rate of 8% and the sinking fund earns an annual effective rate of j. Both methods require a payment of X to be made at the end of each year for 20 years. Calculate j