Bottles of Soda | Slices of Pizza |

The table above gives Ali's total utility from consuming bottles of soda and slices of pizza. The price of pizza is $2 per slice and the price of soda is $1 per bottle. His marginal utility from the 4th bottle of soda is
◦ 21.
◦ 3.
◦ 3 units for soda ÷ 7 units for pizza.
◦ 34.
◦ 5.25.