Chapter 15.4, Problem 3CP

If $K_c=2$ for the reaction ${\text{A}}_{\text{2}}{\text{+ B}}_{\text{2}}\underset{}{\rightleftarrows }\text{ 2AB}$ at a certain temperature, which of the following diagrams represents an equilibrium mixture of ${\text{A}}_{\text{2}}{\text{, B}}_{\text{2}}\text{, and AB}$ ? (Select all that apply.)