Please show all calculation, thanks.

EV (15 points question total) Xoom Corp. is trading at a forward ratio of 10, a EBIT (1-Tc) EV EV EV forward ratio of 5, an ratio of 2 and an ratio of 1. Based on the EBIT Capital Sales previous information please answer the following questions: (a) (5 points) What is Xoom Corp's marginal corporate tax rate (T) equal to? (b) (5 points) What is Xoom Corp's return on capital (ROC) equal to? (c) (5 points) What is Xoom Corp's after-tax operating margin (ATOM) equal to