Calculate the crystal field stabilization energy (CFSE) in Dq units (show your work) for the following octahedral complexes:
a. d6 - strong field (low spin) complex
b. d4 - strong field (low spin) complex
c. d7 - strong field (low spin) complex
d. d8 - strong field (low spin) complex
e. d3 - weak field (high spin) complex
f. d4 - weak field (high spin) complex
g. d5 - weak field (high spin) complex
h. d6 - weak field (high spin) complex