Given the Following Equation, N₂O(g) + NO₂(g) → 3NO(g) Δ_rG°

Given the following equation, N₂O(g) + NO₂(g) → 3NO(g) Δ_rG° = -23.0 kJ mol^-1
Calculate Δ_rG^o for the following reaction:
3NO(g) → N₂O(g) + NO₂(g)

A) -23.0 kJ mol^-1
B) 69.0 kJ mol^-1
C) -69.0 kJ mol^-1
D) -7.67 kJ mol^-1
E) 23.0 kJ mol^-1