An all-equity firm is considering the following projects Project Bta IRR W .62 9.2 % X77 10.3 Y 1.27 14.1 Z 1.42 170 The T-bill rate is 5 percent, and the expected return on the market is 12 percent. Compared with the firm's 12 percent cost of capital Project W has a expected return Project X has a expected return Project Y has a expected return and Project Z has a expected return