Both the forward reaction and the reverse reaction in the following equilibrium are believed to be elementary steps:

At 25 oC the rate constants for the forward and reverse reactions are 1.4 × 10-28 M-1s-1 and 9.3 × 1010 M-1s-1, respectively.
(a) What is the value for the equilibrium constant at 25 oC?
(b) Are reactants or products more plentiful at equilibrium?
(c) What additional information would you need in order to decide whether the reaction as written is endothermic or exothermic?