The table below gives the demand schedule for 3 individuals; A, B and C, for product X.Prices are measured in dollars, and all units of X are discrete units, that is parts of a unit cannot be traded; just whole units of X.Assume that all transaction costs are zero unless stated otherwise in a particular question and assume that if the MV of a buyer is equal to the MV of a seller that the marginal unit will be traded.

A B C $P Q $P Q SP Q 16 16 22 15 2 15 2 20 2 14 3 12 3 17 3 12 4 10 4 12 4 11 5 8 5 10 5 10 7 6 9 6 9 7 6 7 7 7 8 5 8 7 8 5.5 9 2 9 6 9 2 10 0 10 3.5 10