Pete Frost made a deposit into his savings account 3 years ago and earned interest at an annual rate of 8%. The deposit accumulated to $20,500. How much was initially deposited assuming that the interest was compounded (a) annually, (b) semiannually, and (c) quarterly? terly? Use Excel or a financial calculator for computation. Round your answer to nearest dollar. (a) Annually (b) Semiannually (c) Quarterly