The table below shows Liz's total utility (TU) from candy bars and potato chips. Her budget is $4 per day. The price of a candy bar is $1.00 and the price of a bag of chips is $1.00.

Candy Bars Potato Chips

Q TU MU MU/P Q TU MU MU/P

0 0 4 22

1 10 3 19

2 19 2 15

3 27 1 8

4 29 0 0

a. (4 points) Fill in the last two columns in each table. (Remember that the formula for marginal utility (MU) is: TU/Q.) b. (2 points) What combination of candy bars and potato chips should she consume in order to maximize her total utility? Carefully explain.