8. Bell Motors manufactures two models of electric cars. The demand equations giving the relationship between the unit price, p and q, and the number of cars demanded per year, x and y, of Models $1 and $2 are p=60,000-4x-2y and q =50, 000-2x-4y respectively. Note: x and p go with Model S1 and y and q go with Model $2, and in general, Revenue = [number of units produced] x [price demanded at the units produced] a. Create the total yearly revenue function R(x, y). b. What is the total revenue realized by Bell motors if it sells 3000 Model SIs and 2000 Model S2s