(ii) suppose there are only two individuals and one public good in an economy. individual 1's and 2's demand for public good is given by p1 = 90-20 and p2 = 30-

(ii) Suppose there are only two individuals and one public good in an economy. Individual 1's and 2's demand for public good is given by P1 = 90-20 and P2 = 30-Q, respectively. The supply of the public good is given by the equation Q = -10+0.5P. Find the equation for aggregate demand of the public good. Calculate socially optimal quantity of public good.