3.59 Write Lewis structures for each of the following molecules and ions, In each case, the first atom listed is the \begin{aligned} &\text { central atom. }\\ &\text { (a)

} \mathrm{PCl}_{3} ; \text { (b) } \mathrm{SO}_{4}{ }^{2-} ; \text { (c) } \mathrm{PO}_{4}{ }^{3-} ; \text { (d) } \mathrm{ClO} \end{aligned}