Marla has $95.50 in her savings account. she deposits $5 every week. her mother also deposits $20 into the account every time marla washes the car. her savings account balance can be shown with the following expression: 20c + 5w + 95.50 part a: identify a coefficient, a variable, and a constant in this expression. (3 points) part b: if marla saves for 20 weeks and washes the car 5 times, how much will she have in her account? show your work to receive full credit. (4 points) part c: if marla’s mom deposited $10 after each car wash, would the coefficient, variable, or constant in the expression change? why? (3 points)