CHM1025 WS10 Q8

Given the following data:
2 O3 (g) → 3 O2 (g) ΔH = -427 kJ
O2 (g) → 2 O (g) ΔH = +495 kJ
NO (g) + O3 (g) → NO2 (g) + O2 (g) ΔH = -199 kJ
Calculate H for the following reaction
NO (g) + O2 (g) → NO2 (g) + O (g) ΔH = ?