Which relationship is correct for the crystal field splitting energy between octahedral $(\Delta_0)$ and tetrahedral $(\Delta_t)$ complexes?

The crystal field stabilisation energy of $[Co(NH_3)_6]Cl_3$ is

In an octahedral crystal field,the $t_{2g}$ orbitals are:

Given below are two statements:
Statement $I$: Among $Zn$, $Mn$, $Sc$ and $Cu$, the energy required to remove the third valence electron is highest for $Zn$ and lowest for $Sc$.
Statement $II$: The correct order of the following complexes in terms of $CFSE$ is $[Co(H_2O)_6]^{2+} < [Co(H_2O)_6]^{3+} < [Co(en)_3]^{3+}$.

Complexes with $CN^{-}$ ligands are generally .......

Among the following complexes,the one which shows zero crystal field stabilization energy $(CFSE)$ is