Answer:
Some historians and literary analysts believe that Shakespeare wrote Macbeth for King James I. The three "weird sisters" was most likely an influence of King James I dabbling in witchcraft and prophecies. Though its real origins came from the Holinshed's Chronicles, a story about the history of Scotland, England, and Ireland.
Explanation:
You have to start it with a hook. Perhaps ask a question or start with a quote then explain it. Or even just describe the setting.