please help, i cant figure out

The Whenworth Corporation is trying to choose between the following two mutually exclusive design projects: a-1. If the required return is 12 percent, what is the profitability index for each project? (Do not round intermediate calculations and round your answers to 3 decimal places, e.g., 32.161.) 0.2 . If the company applies the profitability index decision rule, which project shouid it: take? b-1. If the required return is 12 percent, what is the NPV for each project? (Do not round intermediate colculations and round your answers to 2 decimal places, e.g., 32.16.) b.2. If the company applies the net present value decision rule, which project should it take