3. Shell Camping Gear, Inc., is considering two mutually exclusive projects. Each requires an initial investment of $100,000. John Shell, president of the company, has set a maximum payback period of 4 years. The after-tax cash inflows associated with each project are shown in the following table: Year Project A $10,000 Project B $40,000 2 $20,000 $30,000 3 $30,000 $20,000 4 $40,000 $10,000 5 $20,000 $20,000 a. Determine the payback period of each project