What is the discounted payback period of a project requiring an initial investment of $12,000 and producing daily positive cash flows that are summarized as $7,000 at the end of each of the next 4 years (i.e., att= 1, t = 2, t= 3, and t = 4). Assume the cost of capital is 19.60% per year. Choose the closest answer. O a. 1.71 years b. 2.21 years 2.31 years d. 2.69 years