H2(g) + co2(g) + 10 kcal h2o(g) + co(g)

in another experiment involving the above reaction at 1,000°c, the equilibrium concentrations were found to be:

h2(g) = 2.0 moles per liter
h2o(g) = 4.0 moles per liter
co2(g) = 5.0 moles per liter
co(g) = 4.0 moles per liter

what is the equilibrium constant, keq, for this reaction?