Hannah is an impoverished student who has only $100 a month to spend on food. She only eats two types of food: pitas and hummus.
a). If hummus costs $4 per pound and pitas cost $2 per pound, write down the equation for Hannah's budget constraint and graph it (with hummus on the x-axis).
b). Hannah reads in a government publication that she can assure an adequate diet by eating hummus and pitas in the fixed ratio of 2 pounds of hummus to 1 pound of pita, so she prefers to limit her diet to that system and does not eat extra of either item (even if it would mean wasting it). How much of each will she purchase? Draw the indifference curve that Hannah reaches on the graph from part (a), being careful to reflect her preferences.