P9-8 Calculating NPV (LO1) A firm evaluates all of its projects by using the NPV decision rule. Year O-NM Cash Flow -$25,000 20,000 13,000 5,000 Required: (a)At a required return of 20 percent, what is the NPV for this project? (Click to select) (b)At a required return of 33 percent, what is the NPV for this project? (Click to select) )