D demand Function : d(x) = 801.9- 0-4 x2 Supply Function : s(x ) = 0.5 x 2 Find equilibrium quantity : Find consumers surplus at the equilibrium quantity : 2. demand function : 1( x ) = 548.8 - 0- 2x2 Supply Function : s ( x )= 0.5 x 2 Find equilibrium quantity : Find consumers surplus at equilibrium quantity : 3. / Suppose the demand Junction for a product is given by the function D (9 ) = - 0.019+22 find the consumers surplus corresponding to 9= 450 units