Assignment Question (a) Suppose that the zinc study described in Section 20.5 would cost $150 for each treated child and $100 for each control. Under the assumptions given in that section, determine the number of control and treated children needed to attain 80% power at minimal total cost. You will need to set up a loop of simulations as illustrated for the example in the text. Assume that the number of measurements per child is fixed at K = 7 (that is, measuring every two months for a year). (b) Make a generalization of Figure 20.6 with several lines corresponding to different values of the design parameter K, the number of measurements for each child