l . With a Utility U(x1, x2) = x13x21 , x1 and x2 are the quantity of good 1 and good 2, measure the marginal rate of substitution (MRS) in functional form. What is MRS(1,1)? 2. Following 1, If p] (price of good 1) and p2 (price of good 2) are $40 and $20 with a budget of $800, What is the optimum consumption bundle (consumer's choice) if the budget must be nished with no saving