Given the demand function of a product is P=-Q^2-4Q+70 and the supply is P=Q^2-2Q+14, where Q is the quantity demanded or supplied and P is the price of the product a) sketch the graph of both function on a single coordinate system on which P is on the vertical axis and Q on the horizontal axis, b) Find the consumer's surplus from the graph. c) Find the Producer's surplus from the graph