Question

Construct the octahedral crystal-field splitting diagram for the metal in each species.
Cr4+
Mn(H2O)6^2+

Answer 1

This board is unable to make drawings/diagrams available. Your best bet is to look by a search engine and see if something is available.

Answer 2

for Mn(H2o)6^2+ there would be a single electron in each of the five shells. This is because it has high spin.