3) Find the appropriate values of n and n2 (assume n = 12) needed to estimate (H1 - (2) for each of the following situations: [30 Points] a. A sampling error equal to 3.2 with 95% confidence. From prior experience, it is known that of ~ 15 and 02 ~ 17. [10 Points] b. A sampling error equal to 8 with 99% confidence. The range of each population is 60. [10 Points]~ c. A 90% confidence interval of width 1.0. Assume that of ~ 5.8 and of ~ 7.5. [10 Points]