(a)For his weekday lunch Dan only has two options: pies (x) which cost $6.25 each, and sausage rolls (y) which cost $2.5 each. He budgets $50 a week for his weekday lunches. Calculate and illustrate his budget constraint.

(b)Following on from (d) Dan informs us that, for him,onepie andtwosausage rolls are perfect substitutes. Calculate his OCB and add this to your illustration appropriately.

(c)Use the following information to calculate Diana's OCB and her resulting utility.