For the following set of cash flows,

Year Cash Flow

$0$$ $8,700$

$16,300$

$25,800$

$33,900$

a$.$ What is the NPV at a discount rate of $0$ percent?

b$.$ What is the NPV at a discount rate of $9$ percent?

c$.$ What is the NPV at a discount rate of $23$ percent?

d$.$ What is the NPV at a discount rate of $28$ percent?