A capital project with the following aftertax cash flows (s in millions) is under consideration:

Year	0	1	2	3	4	5
Cash flow	740	120	120	200	400	150

Assuming a required rate of return of 7 percent, the project's IRR is closest to:

a. 2.3 percent.

b. 6.3 percent.

c. 9.3 percent.