Calculate $\Delta$ _rG ^$\circ$ for the Following Reaction at 425 ^$\circ$

Calculate $\Delta$ _rG ^$\circ$ for the following reaction at 425 ^$\circ$ C,
2 HI(g) H₂(g) + I₂(g)
Given K = 0.018.(R = 8.314 J/K.mol)

A) 6.12 $\times$ 10³ J
B) 1.05 $\times$ 10⁴ J
C) 1.42 $\times$ 10⁴ J
D) 2.33 $\times$ 10⁴ J
E) 3.34 $\times$ 10⁵ J