No excel, I need to be able to work it out on a test. Thank you

The initial outlay or cost for a four-year project is $1,000,000. The respective cash inflows for years 1, 2, 3 and 4 are: $600,000 $700,000 $600,000, and $600,000. What is the discounted payback period if the discount rate is 13%? 1.55 1.86 1.29 2.67 O 2.23