Please answer these two. thank you.

They are two seperate questions. the graph goes with the values directly below it and the question on the bottom is the only information given to answer.

The graph below shows the variation of the concentration of reactants and products for the reaction: A(s)+2B(aq)AB2(aq) at 25C (where A and B represent generic elements). Determine the value of the equilibrium constant K for this reaction under such conditions. 0.28 More information is needed to evaluate K 0.48 0.83 Determine how much faster the reaction will be if [A] is tripled and [B] is reduced by 1/2) and the rate law =373[A]1[B]2