Ellen has $75 in her savings account. she deposits $25 every week. her father also deposits $35 into the account every time ellen mows the lawn. her savings account balance can be shown with the following expression: 75 + 25w + 35m part a: identify a coefficient, a variable, and a constant in this expression. (3 points) part b: if ellen saves for 8 weeks and mows the lawn 2 times, how much will she have in her account? show your work to receive full credit. (4 points) part c: if ellen had $95 in her savings account, would the coefficient, variable, or constant in the expression change? why?