please help, show work.

5.) Jennifer has been given money for her birthday. She puts her money in a savings account offers an annual interest rate of 4.50%, compounded monthly. What is the effective annual rate (EAR) on the saving account?

6.) An individual invests $10,000 today in an investment that is expected to be worth $20,000 in 6 years. What annualized rate of return is the investor expecting to receive on the investment?

7.) A college graduate just bought a new house. The home was purchased with a 30-year loan of $350,000 with monthly payments at an interest rate of 4%. What is the amount of the monthly loan payment?

8.) An investor is evaluating an investment that pays $50,000 for 3 consecutive years and then $25,000 in year 4. The first $50,000 payment comes one year from today. What is the present value of the investments cash flows at an interest rate of 10%?