The Equilibrium Constant for the Reaction Ni(s) + 4CO(g) $\rightleftharpoons$ Ni(CO)₄(g) Is 5

The equilibrium constant for the reaction Ni(s) + 4CO(g) $\rightleftharpoons$ Ni(CO) ₄(g) is 5.0 * 10⁴ at 25ºC. What is the equilibrium constant for the reaction Ni(CO) ₄(g) $\rightleftharpoons$ Ni(s) + 4CO(g)

A) 2.0 * 10^-5
B) 2.5 * 10⁹
C) 5.0 * 10⁴
D) 5.0 * 10^-4
E) 2.0 * 10^-3