Need help on these 3 question please!

QUESTION 3 Suppose that starting today, you make payments of size 100 at the end of each monthly period for the next 20 years. Using a nominal annual interest rate of 3% compounded monthly, find the present value (i.e. value today) of these payments. Give your answer as a decimal rounded to two places (i.e. X.XX). QUESTION 4 Suppose that starting today, you make deposits of size 400 at the beginning of each quarterly period for the next 40 years. Using a nominal annual interest rate of 8% compounded quarterly, find the future value (i.e. value at the end of 40 years) of these deposits. Give your answer as a decimal rounded to two places (i.e. X.XX). QUESTION 5 Give your answer rounded to the nearest whole Given a = 14.00 and d Sali = 55003.24, find n. number (i.e. x)