Mark likes to have 1.5 portions of fries with each burger he eats. He does not eat burgers without fries nor fries without burgers. Let X be the quantity of portions of fries he consumes and Y the quantity of burgers. For simplicity assume that he can consume parts of portions of fries and parts of burgers. Which of the following represents his preferences? Question 6 options: U(X,Y)=min{3X,2Y} U(X,Y)=1.5X+Y U(X,Y)=min{1.5X,Y} U(X,Y)=min{2X,3Y}