A mixture of 1.16 mole of A, 1.35 mole of B and 0.641 mole of C is placed in a one-liter container at a certain temperature. The reaction was allowed to reach equilibrium. At equilibrium. the number of moles of A is 1.95. Calculate the equilibrium constant, Kc, for the reaction:

2 A (g) <--> 2 B (g) + C (g)