"You are borrowing $3,600 now, which you will pay back at the end of 16 years. You are considering two separate interest rates: a. A fixed 7.8% annual interest rate. b. A variable interest of 3.7% annual interest for the first 5 years; 6.5% annual interest rate for next 5 years; and i% interest rate for the remaining years. Assuming you desire to pay the least amount of money back at the end of 16 years, what value of i makes you indifferent between options a and b? With both options, you make exactly one payment at the end of 16 years. Enter your answer as a percentage between 0 and 100." Enter