Calculate the enthalpy of the reaction 2no(g)+o2(g)→2no2(g)

Part A Calculate the enthalpy of the reaction
2NO(g)+O2(g)→2NO2(g) given the following reactions and enthalpies
of formation: 12N2(g)+O2(g)→NO2(g), ΔH∘A=33.2 kJ
12N2(g)+12O2(g)→NO(g), ΔH∘B=90.2 kJ Express your answer with the
appropriate units.

Part B)

Calculate the enthalpy of the reaction

4B(s)+3O2(g)→2B2O3(s)

given the following pertinent information:

B2O3(s)+3H2O(g)→3O2(g)+B2H6(g),    ΔH∘A=+2035
kJ

2B(s)+3H2(g)→B2H6(g),                            ΔH∘B=+36
kJ

H2(g)+12O2(g)→H2O(l),                ΔH∘C=−285
kJ

H2O(l)→H2O(g),                                          ΔH∘D=+44
kJ

Express your answer with the appropriate units.