how to solve these through excel

A firm is cvaluating 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 11. between 2 and 3 years Answer: D Question 1 A firm is evaluating a proposal which has an initial investment of $50,000 and has eas h flows of $15,000 per year for five years. The payback period of the nmient is