how to solve through excel

Example 1 A firm is evaluating a proposal which has an initial investment of $35,000 and has cash flows of $10,000 in year 1,$20,000 in year 2 , and $10,000 in year 3 . The payback period of the project is A. 1 year B. 2 years C. between 1 and 2 years D. between 2 and 3 years Answer: D