How did feudalism work? select all that apply.

1.a lord would be given land by the king in return for homage or a promise to serve the king when called upon.

2.a knight would be given a fiefdom by a vassal and act a part of a standing army for the vassal.

3.a serf would be given a fiefdom by a knight and protect the lands outside of the castle walls.

4.a vassal depended on the agricultural production of serfs to feed the whole system.

5.a king would hire a vassal to provide an army and political advice during times of war.