Anderson has $50 in his savings account. He deposits $5 every week. His father also deposits $20 into the account every time Anderson mows the lawn. His savings account balance can be shown with the following expression: 50 + 5w + 20m Part A: Identify a coefficient, a variable, and a constant in this expression. Part B: If Anderson saves for 10 weeks and mows the lawn 2 times, how much will he have in his account? Part C: If Anderson had $85 in his savings account, would the coefficient, variable, or constant in the expression change? Why?