\(\begin{array}{lllll}\text { Sketch all the possible } & \text { stereoisomers } & \text { of }\end{array}\) (a) \(\left[\mathrm{Rh}(\text { bipy })(o \text { -phen })_{2}\right]^{3+}\), (b) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}(\text { bipy }) \mathrm{Br}\right]^{2+},\) (c) square-planar \(\left[\mathrm{Pd}(\mathrm{en})(\mathrm{CN})_{2}\right]\).

The possible stereoisomers for the given complexes are: (a) \(\left[\mathrm{Rh}(\text { bipy })(o \text { -phen })_{2}\right]^{3+}\): 1. cis - both o-phen ligands are adjacent to each other, and bipy is opposite to one of them. 2. trans - both o-phen ligands are opposite to each other. (b) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}(\text { bipy })\mathrm{Br}\right]^{2+}\): 1. fac - the three ammine ligands are in a facial arrangement. 2. mer - the three ammine ligands are in a meridional arrangement. (c) square-planar \(\left[\mathrm{Pd}(\mathrm{en})(\mathrm{CN})_{2}\right]\): 1. cis - both cyanide ligands are adjacent to each other. 2. trans - both cyanide ligands are opposite to each other.