Please tell what's the correct hybridisation, magnetic behaviour, and formula of geometrical or optical isomer for the complexes 
$$\begin{gathered} \left[Cr\right(N{H}_3{)}_{4}C{l}_2\left]Cl \\ \right[Co\left(N{H}_3{)}_{4}C{l}_2\right]Cl \\ \left[Fe\right(N{H}_3{)}_{4}C{l}_2\left] \\ \right[Co\left(en{)}_3\right] \end{gathered}$$