A proposed project has the following costs and benefits. Using linear interpolation, the project's discounted payback period (use i=10%) is Year Costs Benefits 0 $4,000 1 $1,200 2 $1,200 3 1,000 4 4 1,000 5 3,000 6 2,000 A. 6.35 years B. 5.82 years OC. 4.24 years OD.3.37 years