plz help me this question with full steps thx.

(10 points) Bell Motors manufactures two models of electric cars S1 and S2. The demand equations giving the relationship between the unit price, p and q, and the number of cars demanded per year, x and y, are p=60,0004x2y,q=50,0002x4y. What is the domain of the total yearly revenue function R(x,y) ? Sketch the domain of R(x,y)