3) How did Esther save the Jewish population of the Persian Empire?
She exposed a plot by the king's advisor, Haman, to kill the Jews and seize their property
She exposed a plot by an army commander, Hegai, to assassinate the king's advisors and blame it on the Jews.
She convinced the king to protect the Jews from gangs of bandits who were killing them and stealing their property
She rallied the Jews to defend themselves against persecution by the Persian army.