Given the following data

C2H4 (g) + 3O2(g) -----> 2CO2(g) + 2H2O (l) AH = -1411 kJ

2C2H6(g) + 7O2(g) -----> 4 CO2(g) + 6H2O (l) AH = -3119.8 kJ

2H2(g) + O2 (g) -------> 2H2O (l) AH = -571.7 kJ

Calculate AH for the reaction

C2H4(g) + H2(g) --------------> C2H6(g)