Effect of Temperature on Equilibrium Concentrations

Consider the following equilibrium reaction: N2(g) + 3H2(g) <=> 2NH3(g). The reaction is exothermic, and the equilibrium constant, Kc, at a certain temperature is 6.0. If the reaction is allowed to reach equilibrium starting with 2 moles of nitrogen and 6 moles of hydrogen in a closed container, how will the equilibrium concentrations be affected if the temperature of the reaction is increased?