Step-1 a) when Congress imposed a price floor of $2 then at this price floor , qaunttity demanded is 150 units and quantity supplied is 80 units so there is *shortage* because Qd>Qs by 70 units. b) when price floor is $2 then this irritating the buyers because at this price there is shortage which means consumers are unable to fullfill their demand. So, when price ceiling is $3 then at this price Quantity demanded is 120 unit and quantity supplied is also 120 unit so there is no shortage or surplus because Qd=Qs. Final