The Seattle Corporation has been presented with an investment opportunity which will yield cash flows of $30,000 per year in Years 1 through 4, $35,000 per year in Years 5 through 9, and $40,000 in Year 10. This investment will cost the firm $150,000 today, and the firm's cost of capital is 10 percent. What is the payback period for this investment?

a - 5.23 years

b - 4.86 years

c - 4.00 years

d - 6.12 years

e - 4.35 years