Question 7 (part of QUESTION B2) The Total Cost changes to the following: Traditional cars: Total Cost = 4000 T – 100 T2 where T is the number of traditional cars made; Electric cars: Total Cost = 3000 E – (200+4.7) E2 where E is the number of electric cars made. The price is set by the demand curve (for both types of car combined): Price = 9000 – 100T – 100E On a piece of paper, write a formula for total profit (for both cars combined). Find the partial derivative of total profit with respect to T (write it down on paper). Find the partial derivative of total profit with respect to E (write it down on paper). Assuming each partial derivative at zero implies maximum profit (not minimum profit), find the value of T which gives the highest possible profit: