Specifically need help with D

Consider the following projects: a. If the opportunity cost of capital is 12%, which project(s) have a positive NPV? b. Calculate the payback period for each project. c. Which project(s) would a firm using the payback rule accept if the cutoff period is three years? d. Calculate the discounted payback period for each project. e. Which project(s) would a firm using the discounted payback rule accept if the cutoff period is three years Complete this question by entering your answers in the tabs below. Calculate the discounted payback period for each project. (Do not round intermediate calculations. Round your an decimal places. If a project never pays back, enter " 0 ".)