Question [3]: Let us consider the demand function (for Cobb-Douglas preferences) 4mi r(p, w) = 10p1 Gin 10pz 1. Verify Cournot aggregation. 2. Verify Engel aggregation. 3. Suppose that the consumer has income of 20 and that the initial price vector is (pi, p2) = (2,2). Now let p, change to 1. Find the total impact on the demand for good 1, and break it down into an income effect and a substitution effect (use Slutsky compensation.)