1 Compute the following for the function defined below. Simplify your answers. Note: Use lowercase letters in your answers. f(x) = 3x2 2x + 7 (a) f(a) = (b) f(a+h) = (c) f(a+h) f(a) = (d) f(a + h) f(a)/h = Question 2 John works for the local used car dealership. His weekly salary is $300 plus a commission based on the number of cars that he sells. His commission is $60 per car for the first 5 cars sold each week. For any car over 5 sold each week, John earns a commission of $170 per car. Complete the piecewise function that can be used to calculate John's weekly salary, S, when he sells t cars each week. Note: Use the letter t as your variable. S(t) = if 0 t 5 if t > 5 Question 3 Nationwide Communications offers its customers a monthly plan for text messaging. Customers under this plan pay a flat rate of $15.00 each month for up to 250 text messages. For each additional text message over 250 (up to 1500 messages), the customer will pay $0.10. For each message over 1500 messages, the customer will pay $0.40. Complete the piecewise function that can be used to calculate the monthly billing amount, B, for a monthly level of t text messages. Note: Use the letter t as your variable. B(t) = if 0 t 250 if 250 < t 1500 if t > 1500