(a) Draw a set of resonance structures for the hypothetical molecule PH₅, ensuring that P obeys the octet rule in each structure. Assume a structure analogous to that of PF₅.

(b) To what point group does PH₅ belong?

(c) Using PH₅ as a model compound, use a ligand group orbital approach to describe the bonding in PH₅. Show clearly how you derive the symmetries of both the P atomic orbitals, and the LGOs of the H₅ fragment.