Use the model in File C17 to solve this problem. Refer back to Problem 17-11.

Rework parts (a) through (d) using the computerized model, but make the following changes. Consider each change to be independent of the others; that is, in each case, assume all values except those to be changed remain the same as originally stated in Problem 17-11.

a. All else is equal, except the debt/assets ratio is 70 percent for Firm A, 40 percent for Firm B, and 30 percent for Firm C.

b. All else is equal, except the EBIT for each firm is $15,000.

c. All else is equal, except the marginal tax rate for each firm is 40 percent.