need answer asap

A firm is considering the following projects. Its opportunity cost of capital is 8%. a-1. What is the payback period on each project? (Do not round intermediate calcula number.) a-2. What is the discounted payback period on each project? (Do not round intermediate decimal places. If any of the projects does not pay back on a discounted basis, enter ze b. Given that you wish to use the payback rule with a cutoff period of 2 years, which projects n