If the marginal benefit of a product moves from $50 at one quantity to $30 at the second quantity to $10 at the third quantity... and the marginal cost is always $25,

(a) how many of the product would you sell, if you could sell whatever quantity you produce (show your reasoning);

(b) draw a graph of marginal benefit and total benefit for quantities 0-3, with proper vertical and horizontal descriptions;

c) draw a graph of (a) indicating where you would STOP producing and indicate the appropriate equation.