The number of paramagnetic species from the following is_____. $\begin{aligned} & {\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\right]_1,\left[\mathrm{NiCl}_4\right]^{2-}} \\ & {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}} \\ & {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \text { and }\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}}\end{aligned}$