In this problem, you will compare the level of a public good chosen under majority voting with the socially optimal level under three dif- ferent sets of circumstances. Suppose first that individual i's demand curve for z is given by ai/z, where ai is a positive parameter. Instead of being linear, this demand curve is a hyperbola. Suppose further that z costs $1 per unit to produce (c = 1) and that this cost is shared equally among consumers. Therefore, cost per person is 1 per unit of z. Then consider the three sets of circumstances listed below. Each situation has a different number of consumers in the economy and different collections of a values for the consumers. The number of consumers is denoted by n and the vector of a values by A = (al, 02, . . ., an - 1, an). Case 1: n = 7, A = (4, 2, 12, 4, 5, 13, 8). Case 2: n = 5, A = (10, 6, 11, 14, 8). Case 3: n = 9, A = (6, 9, 10, 4.5, 12, 7, 13.5, 8, 11). Using this information, do the following: (a) For each case, compute the preferred z level for each voter. Identify the median voter, and indicate the z level chosen under majority voting