please show excel formula on how you got the answer and explain why thats the answer please.

LO 4 16. SML and WACC An all-equity firm is considering the following projects: Project Beta IRR .80 w .90 9.3% 11.4 12.1 15.1 Y Z 1.10 1.35 CHAPTER 12 Cost of Capital a. The T-bill rate is 4 percent, and the expected return on the market is 12 percent. Which projects have a higher expected return than the firm's 12 percent cost of capital? b. Which projects should be accepted? c. Which projects will be incorrectly accepted or rejected if the firm's overall cost of capital were used as a hurdle rate