2-38 What is the sum of the discounted cash flows at 13%/annum interest compounded annually from Problem 2-37 if it is assumed that the net cash flows are received at the middle of each year? (Year O is a zero length period; Year 1 is 6 months long (mid-year).) The effective date of the study is Year 0. Year o NCF,$ - 1000 400 1 O Nm 600 200