please solve and show all steps and calculation

Equilibrium Constant Expressions Select the correct expression for the equilibrium constant for each of the following reaction equations. CO2(g)+CaO(s)CaCO3(s)C2H4(g)+H2(g)C2H6(g)N2(g)+3Mg(s)Mg3N2(s)2FeCl3(s)2FeCl2(s)+Cl2(g) A. 1/[N2] B. [C2H4][H2][C2H6]1 C. [Cl2] D. [Mg3N2][Mg]3[O2]1 E. [C2H6][C2H4]1[H2]1 F. [CaCO3][CaO1[CO2]1 G. [FeCl3]2[FeCl2]2[Cl2]1 H. none of the above