Answer
According to the students description, the formula of the complex is $\mathrm{K}_{3}\left[\mathrm{FeBr}_{2} \mathrm{Cl}_{2}(\mathrm{OH})_{2}\right]$, and the correct IUPAC name is potassium dibromodichlorodihydroxoferrate(III).
Work Step by Step
See answer above.