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.

$\backslash$table$[[,0,1,2,3,4,5,],[,,,,,,,],[,,,,,,,],[$Stream A$,$$$0,$$$150,$$$450,$$$450,$$$450,$$$250,],[$Stream B$,$$$0,$$$250,$$$450,$$$450,$$$450,$$$150,],[$Stream A:$,,,,,,,],[$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: $