Year Cash Flow

$0$$ $9,600$

$13,300$

$24,200$

$35,200$

a$.$ What is the profitability index for the cash flows if the relevant discount rate is $11$ percent?

b$.$ What is the profitability index for the cash flows if the relevant discount rate is $15$ percent?

c$.$ What is the profitability index for the cash flows if the relevant discount rate is $26$ percent?