$\begin{array}{1 1}(a)\;\text{It contains }Cs^+,Br^-\text{ and lattice }Br_2\text {molecule}\\(b)\; \text{It contains }Cs^+\text{ and }Br_3^-\text{ ions}\\(c)\;\text{It contains }Cs^{3+},\text{and }Br^-\text{ ions}\\(d)\;\text{It is a covalent compound}\end{array}$