For each of the following cases, indicate (a) what interest rate columns and (b) what number of periods you would refer to in looking up the present value factor. (1) In Table 3 (present value of 1): Number of Discounts Annual Rate Years Involved per Year Case A 10% 6 Case B 8% 15 Case C 12% 10 Annually Semiannually Semiannually Case A Case B Case C (a) % % (2) In Table 4 (present value of an annuity of 11 (b) periods periods periods Annual Rate Number of Years Involved Number of Payments Involved Frequency of Payments Case A 12% 20 20 Annually Case 0% 7 Annually Case C 16 Semiannually