Select the cases of homogeneous catalysis out of

(1) 2SO2(g)+O2(g)⟶NO(g)2SO3(g)SO2 and O2 and NO (catalyst) are in gaseous phase - thus homogenous.(2) 2SO2(g)+O2(g)⟶Pt(s)2SO3(g)SO2 and O2 are in gaseous phase but Pt(catalyst) in solid phase - thus heterogeneous.(3) CH3COOCH3(l)+H2O(l)⟶H+(aq)CH3COOH(l)+CH3OH(l)Reactants and catalyst are in liquid phase- homogeneous(4) C12H22O11(aq)+H2O(l)⟶H+(aq)C6H12O6(aq)+C6H12O6(aq)Reactants and catalyst are in liquid phase - homogeneous catalysis