Say you buy an house as an investment for 300000$ (assume that you did not need a mortgage). You estimate that the house will increase in value continuously by 37500$ per year. At any time in the future you can sell the house and invest the money in a fund with a yearly interest rate of 7.5% compounded quarterly.

If you want to maximize your return, after how many years should you sell the house? Report your answer to 1 decimal place.

$years =$