A firm evaluates all of its projects by using the NPV decision rule. Year Cash Flow -$31,000 22,000 12,000 6,000 a. At a required return of 23 percent, what is the NPV for this project? $ (1,958) $ (2,056) $ (1,879) $ (1,997) 0123 b. At a required return of 37 percent, what is the NPV for this project? $-6,525.42 $-5,966.10 $-6,338.98 $-6,090.39