Calculate the discounted payback period for project S considering the following estimated data: Initial cost at time 0 = $1,000 After-tax, end of year cash inflows are as follows: first year $500 second year $400, third year: $300; fourth year: $100. The risk-adjusted cost of capital (or WACC) is 10%. Select one: O a. 3.78 O 0.42 O C.3.1 O 0.2.95