Determine the Standard Enthalpy of Formation for N₂O Given the Following

Determine the standard enthalpy of formation for N₂O given the following information about the formation of NO₂ under standard conditions, and $\Delta$ H_f ^° (NO₂) = + 33.2 kJ/mol.
N₂O(g) +3 O₂(g) $\rightarrow$ 4 NO₂(g) $\Delta$ H_rxn = -31.4 kJ

A) (+82.1 kJ/mol)
B) (-82.1 kJ/mol)
C) (+164.2 kJ/mol)
D) (-164.2 kJ/mol)
E) (+50.7 kJ/mol)