12. Problem 5.18 (Uneven Cash Flow Stream) B eBook Problem Walk-Through 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 5 Stream A Stream B Stream A: $ $0 $100 $0 $250 $400 $400 $400 $400 $400 $400 $250 $100 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: $