Chapter 5, Problem 33RQ

Assign oxidation numbers to the elements in the following: $\left(\text{a}\right){\text{ Bi}}_{\text{2}}{\text{S}}_{\text{3}}\text{, }\left(\text{b}\right){\text{ CeCl}}_{\text{4}}\text{, }\left(\text{c}\right)\text{ C}s{\text{O}}_{\text{2}}\text{, and }\left(\text{d}\right){\text{ O}}_{\text{2}}{\text{F}}_{\text{2}}\text{.}$