CVS Pharmacy 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%. What is the payback period for this investment?

5.23 years

4.86 years

4.00 years

6.12 years

4.35 years