Please help me to solve this problem, I need to use Excel to solve the process

Question 9 0 / 10 pts You are considering refinancing your mortgage, which has 15 years remaining, with a new 15-year mortgage. Your current payment is $1,250 per month and your new payment would be $1,125. Assume that the payment savings would exist for 15 years. The closing costs for the refinance would be $4,200. What rate of return would you earn on the $4,200 investment you have to make in closing costs in order to refinance? 3.5% 13.58% wer 35.53% ered 21.83%