Jayron's preferences for boxes of cereal (x) and bags of muffins (y) can be represented by the utility function U(x,y) = xy3. Let Px be the price of a box of cereal, Py be the price of a bag of muffins and I be the income Jayron has to spend each month on these goods. a) Find Jayron's Marshallian demand functions for cereal and muffins. b) If Px = $5, Py = $5 and I = $120 then how many boxes of cereal and bags of muffins does he demand? Illustrate his best bundle in an indifference curve diagram. Suppose that the price of a bag of muffins rises to $6 (price of cereal and income remain constant)