Chapter 6, Problem 6.49P

Draw an energy diagram for the following reaction in which $\Delta H=-\text{12 kcal/mol}$ and
$E_a=-{\text{12 kcal: A}}_{\text{2}}{\text{+ B}}_{\text{2}}\to \text{2AB}\text{.}$ Label the axes, reactants, products, transitionstate, $E_{a,}$ and $\Delta H.$ Is the reaction endothermic or exothermic?