Moderate# Mrs. A, Mr. B, Good X, and Utility Possibility Frontiers

MICRO-ANVD7E

Let’s say there are $5$ units of Good X to distribute to Mrs. A and Mr. B. Mrs. A and Mr. B both have a utility function $U(x) = x^2$, where $x$ is the number of units each person has.

Which of the following graphs represents the utility possibilities frontier?