please solve and explain

Consider the following system at equilibrium where H=111kJ, and Kc=6.30, at 723K : 2NH3(g)N2(g)+3H2(g) If the VOLUME on the equilibrium system is suddenly decreased at constant temperature: The value of Kc increases decreases remains the same The value of Qc is greater than Kc is equal to Kc is less than Kc The reaction must run in the forward direction to reestablish equilibrium. run in the reverse direction to reestablish equilibrium. remain the same. It is already at equilibrium. The number of moles of H2 will increase decrease remain the same