Consider a market where supply and demand are given by  = -10+ and = 56 -. Suppose the government imposes a price floor of $25, and agrees to purchase any and all units consumers do not buy at the floor price of $25 per unit.

a. Determine the cost to the government of buying firms’ unsold units.

b. Compute the lost social welfare (deadweight loss) that stems from the $25 price floor.