Who EVER ANSWERS FIRST GETS 5 STARS AND BRAINLIEST 

PLEASE HELP ME 

Part A. Riley and Louie each have $5,000 to invest. They both invest at a 2.5% simple interest rate.

Part B. Riley keeps her money invested for 7 years. How much interest will she earn?

Part C.After those 7 years how much will her investment be worth?