Consider the following two mutually exclusive projects: Whichever project you choose if any, you require a $6\%$ return on your investment. A$.$what is the payback period for project a$?$ B$.$ What is the payback period for project b$?$ C$.$ What is the discounted payback period for project a$?$ D$.$what is the discounted payback period for project B$?$ E$.$ What is the NPV for project a$?$ F$.$what is the NPV for project B$?$ G$.$what is the IRR for project a$?$ H$.$ What is the IRR for project b$?$ I. What is the profitability index for project a$?$ J$.$ What is the profitability index for project B$?$