Fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table:

$\backslash$table$[[,$Some ionic compounds$],[$cation$,$anion,empirical formula,name of compound$],[C{o}^{3+},C{l}^{-},,],[M{g}^{2+},S^{2-},,],[R{b}^{+},O^{2-},,],[C{o}^{2+},B{r}^{-},,]]$