a. Find the present values of the following cash flow streams at a 7% discount rate. Do not round intermediate calculations. Round your answers to the nearest cent. 0 1 2 3 4 5 Stream A $0 $0 $150 $250 $400 $400 $400 $400 $400 $400 $250 $150 Stream B Stream A: $ Stream B: $ b. What are the PVs of the streams at a 0% discount rate? Round your answers to the nearest dollar. Stream A: $ Stream B: $