4. Identify the first-row transition metal M that satisfies the requirements given (more than one answer may be possible). Be sure to show your work. a. [M(H2O)6]3+ having one unpaired electron b. [MBr4]− having the most unpaired electrons c. diamagnetic [M(CN)6]3− d. [M(H2O)6]2+ having LFSE = −3/5Δo