A consumer has Birr 600 to spend on two commodities, he first of which costs Birr 20 per unit and the second Birr 30 per unit. Suppose that the utility derived by the consumer from X units oft the first commodity and Y units of the second commodity iS given as U(X, Y)= 10X0.6y04 A. Construct budget equation B. How many units of each commodity should the consumer buy to maximize utility