Draw all the unique isomers for the complex [Co(NH3)3(H2O)ClBr]+, which has cobalt in an octahedral geometry. Identify whether each isomer is chiral or achiral. Predict the number of unpaired electrons expected for this complex. (Hint: Co3+ is usually low-spin.) Consider the following two chromium-containing compounds: Compound A: K3[Cr(CN)6] Compound B: [Cr(en)Cl(H2O)3]Cl2 en = ethylenediamine, H2NCH2CH2NH2 a) Provide a systematic name for each compound. b) One of these compounds is red, the other is yellow. Choose which is which and explain your choice using the language of crystal field theory. c) Draw all unique geometric isomers of the complex [Cr(en)Cl(H2O)3]2+. Indicate whether each one is chiral or achiral. (You can abbreviate the "en" ligand as "N-N" in your drawing.)