a) how do you calculate the discounted payback period for each project (please show work)

b) which project/s would a firm using the discounted payback rule accept if the cutoff period is 3 years.

opportunity cost of capital is 10%

( 2. Payback Consider the following projects: Cash Flows ($) Project Co C1 C2 C3 CA Cs A -1,000 0 0 0 +1,000 0 +1,000 +1,000 B -2,000 +4,000 +1,000 +1,000 +1,000 C -3,000 +1,000 +1,000 0 +1,000