Zeta Gaming Company has an opportunity to purchase video game phone app that will cost $150,000. Zeta expects the demand for the app to start strong but to diminish as people tire of the game. The expected cash inflows are as follows: Year 1 Year 2 Year 3 Year 4 Year 5 $60,000 $50,000 $40,000 $30,000 $20,000 If Zeta uses the average approach the payback period for this investment is

a. 2 years

b. 3.75 years

c. 4.25 years