DCR Limited is considering the purchase a new machine at a cost of $100,000 and an expected useful life of 6 years at which time it could be sold for $10,000. The machine is expected to generate net cash inflows of $21,000 in the first 2 years, $25,000 in the 3rd year, $30,000 in the 4th year and $26,000 for the last 2 years. When is cash payback achieved? a. 2.96 years b. 4.12 years c. 4.53 years d. 5.00 years