I need someone to double check these answers please.

4.) An investor can make an investment in a real estate development project today and receive an expected cash return of $625,000 at the end of 6 years. Based on a careful study of other investment alternatives, the investor believes that a 12.0 percent annual return compounded quarterly is a reasonable return on this nvestment. How much should the investor pay to invest in the project today? 625,000 12% FV PMT PV ($41,176.31) 5.) How many years will it take for your deposit to triple if you place it in an account that earns 7 percent a year (compunded annually)? FV 0.07 16.23757367 PV 5.) At the end of 5 years, your friend wants to have $75,000 saved for a down payment on a condo. She expects to earn 5.50% (compounded monthly) on her investments over the next 5 years. How much would your friend have to put in her investment account at the end of each month to reach her goal? 75,000 0.055 FV ($173.03) PMT PV