An all-equity firm is considering the following projects: Project Beta W 51 .94 Y 1.06 Z 1.54 IRR 10.4 % 10.9 14.4 17.4 The T-bill rate is 5.4 percent, and the expected return on the market is 12.4 percent. Compared with the firm's 12.4 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