For Compound Interest - Dont understand Please and thank you!

Compound Interest 5. You invest $100 in a certificate of deposit that pays a nominal annual rate of 5%, with monthly compounding. Let A be the amount in the account (in dollars) and let t be the time in years) since your initial investment. 5.1. Write the equation for the amount A in the account at time t. Answer (2 points): A 5.2. How much is in the account after 4 years? Answer (2 points): 6. You invest $100 in a certificate of deposit that pays a nominal annual rate of 5%, with continuous compounding. Let A be the amount in the account (in dollars) and let t be the time (in years) since your initial investment. 6.1. Write the equation for the amount A in the account at time t. Answer (2 points): A = 6.2. How much is in the account after 4 years? Answer (2 points)