Misc: Which eminent Greek philosopher famously tutored Alexander the Great?

Questions

In 79 Mt Vesuvius erupts, buries Pompeii and---------- . ?

In 410 ---------- overrun by Visigoths, symbolized fall of Western Roman Empire. ?

In 410 Rome overrun by---------- , symbolized fall of Western Roman Empire. ?

In 1113 ---------- Plantagenet France, conquered Normandy, born. ?

In 1113 Geoffrey ---------- France, conquered Normandy, born. ?