Answer:
PV of cash outflows = Annuity*(1-1/(1+rate)^number of terms)/rate
= 5000000000*(1-1/(1+9%)^6)/9%
= 22429592951.15
PV of inflows at end of 6 years= Annuity*(1-1/(1+rate)^number of terms)/rate
= 200000000*(1-1/(1+9%)^100)/9%
= 2221820304.00
PV of inflows now = 2221820304/1.09^6 = $1,324,798,853.47
NPV = -22429592951.15+1324798853.47
= -21104794098
We see that the Net Present value added by this method is negative. Hence the project is not beneficial.