Consider the following cash flows. Assume the discount rate is greater than zero. year 0: project expenditure = -100; project income = 0 year 1: expenditure = 0; income = +60 year 2: expenditure = 0; income = +60 year 3: expenditure = -20; income = 0 year 4: expenditure = 0; income = +30 What is the discounted payback period (DPP)? O 1) Longer than the simple payback period 2) The DPP means the same thing as the NPV 3) Because of the negative expenditure in year 3, the DPP cannot be computed. O 4) Shorter than the simple payback period 5) If a discount rate is applied, the expenditures are not paid back