How do I find the missing cash flow 3 in the San Andreas project?

PROJECT Vice City San Andreas Chinatown t: CASH FLOWS 1 2 3 10 10 10 10 40 C 0 -100 30 30 30 30 0 -100 -100 80 4 5 100 0 0 (beta) 1.5 0.7 0.5 r (cost of capital) 6 3.6 3 NPV 9.38 4 11.51