Consider four projects with the following sequences of cash flows: Period C A -20,000 O 0 . -20,000 -10,000 10,000 30,000 40,000 -13,870.19 -13,870.19 -13,870.19 D -30,000 -2,500 10,000 -5,000 40,000 What is the type of each investment? Calculate the IRR for each simple investment