Please help, I need this by 10 30 AM Friend A donated $20.00 plus $1.25 for every lap Chloe swam.

Friend B donated $15.00 plus $2.50 for every lap Chloe swam.

Friend C donated $40.00 plus $1.50 for every lap Chloe swam.

Friend D donated $25.00 plus $1.75 for every lap Chloe swam.

Part A

How many laps did Chloe swim if her four friends raised $450 all together?

Part b

Using the number of laps that Chloe swam from Part A, who donated the most money, Friend B or Friend C?