1) You pay off a $200,000 loan at effective annual interest rate of 7% by making interest payments at the end of each year and paying off the principle in one lump sum at the end of 30 years. You will accumulate the $200,000 by making deposits at the end of each year into a sinking fund earning an effective annual interest rate of 8%. If the total yearly outlay is 1.25X each year for the first 10 years and X for the next 20 years then find X