The number of complexes from the following with no electrons in the t_2 orbital is ____. TiCl_4,[ MnO_4]^-,[ FeO_4]^2-,[ FeCl_4]^-,[ CoCl_4]^2-

The number of complexes from the following with no electrons in the $\displaystyle t_2$ orbital is $\displaystyle \_\_\_\_$. $\displaystyle \mathrm{TiCl}_4,\left[\mathrm{MnO}_4\right]^{-},\left[\mathrm{FeO}_4\right]^{2-},\left[\mathrm{FeCl}_4\right]^{-},\left[\mathrm{CoCl}_4\right]^{2-}$