required rate of return = 15%

year

year	cash flow ($ in millions)
0	-500
1	90
2	100
3	150
4	180
5	190
6	140
7	100
8	80
9	60
10	-50

using excel, draw npv profile and find "two" IRRs.

There should be two IRRs. If you get two IRRs, the NPV profile graph should look like a parabola curve.

I figured out the first IRR which is 19% (19.45...% to be exact) but I can't seem to get the second one.