Erica's parents gave her $500 for her high school graduation. You put the money into a savings account that earns 7.5% annual interest. She left the money in the account for two years before she withdrew it. How much interest did the account earn? b.) How much is in Erica's account at the end of two years? (Find the balance.) (Hint: The interest plus the starting amount.)

2a) If she would have left the money in the account for 2 years (Hint: 4 years total) before withdrawing, how much interest would the account have earn?

b) How much is in Erica's account at the end of 4 years?

Please answer this correctly! I'll give brainliest!​