Shell is considering two mutually exclusive projects, A and B. Each requires an initial investment of $100,000. The company's president set a maximum payback period of 5 years. If the company expects to receive the following after-tax cash inflows from each project, what is each project's simple payback period? Year Cash inflows project A Cash inflows project B 1 $10,000 $40,000 2 $20,000 $30,000 3 530,000 $20,000 4 $40,000 $10,000 5 $20,000 $20,000 a. Both projects have a payback period of 4 years b. Both projects have a payback period of 5 years O c. Payback periods: A-4years, B-5years O d. Payback periods: A-5years, B 4years