On the basis of the three individual demand schedules in the following table, and assuming these are the only three people in the society, determine (a) the market demand schedule on the assumption that the good is a private good and (b) the collective demand schedule on the assumption that the good is a public good.

What is the public demand price and how do you calculate that?

Individual 1 Individual 2 Individual 3 (a) Private Demand Price (b) Public Demand Qd Price Qd Price Qd Price Qd Price $16 Qd 0 $16 1 $16 0 $16 14 1 0 14 1 2 14 1 14 12 3 1 12 2 3 12 2 12 10 6 2 10 3 4 10 3 10 8 9 3 8 4 5 8 4 8 6 12 4 6 5 6 6 5 6 4 15 5 4 6 7 4 6 4 2 18 6 7 2 8 2 7 2 21 8