The theory of the standard model of electroweak unification, incorporating the Higgs mechanism, requires the W^±, Z^0 and H^0 bosons and describes their couplings. (a) As briefly as possible draw the allowed 3-point vertices of both Z^0 and H^0 bosons and how they interact with fermions in the standard model, indicating the coupling strength at the vertex. Are the respective coupling constants the same in all cases?