Brief Exercise 6-7 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 discount rate. (1) In Table 3 (present value of 1): Number of Annual Rate Years Involved te Years Involved Case A 9% Case B 11% Case C. Discounts per Year Annually Annually Semiannually (a) Case A periods Case B periods Case C periods (2) In Table 4 (present value of an annuity of 1): Number of Number of Annual Rate Years Involved Payments Involved 10% 9% 14 Case A Case B Case C Frequency of Payments Annually Annually Semiannually 8% e Case A periods Case B periods Case C periods