a. Find the present values of the following cash flow streams at a 6% discount rate. Do not round intermediate calculations. Round your answers to the nearest cent. 0 1 2 3 $450 $450 $450 Stream A Stream B $0 $0 $150 $300 $450 $450 $300 $150 $450 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: $