Please answer $4$a$-$b$,$ using the following table:

Year Cashflow

$0-70,000$

$141,000$

$220,000$

$330,000$

Problem $4$a$-$b: Calculating NPV$.$ For the cash flows in the previous problem, suppose the firm uses

NPV to evaluate projects.

$4$a$.$ At a required return of $11\%$ the projects NPV is $$\_\_\_\_\_\_\_\_.$

$4$b$.$ At a required return of $20\%$ the projects NPV is $$\_\_\_\_\_\_\_\_.$