By the time hrothgar's grief is told and sung, what events have occurred in the poem? List them in order

-Hrothgar has built Herot, the dining hall where warriors gather and listen to scope and sing of the wonders of God's creation.
- the monster Grendel cannot bear to hear the warriors rejoicing.
- Grendel attacked Herot and slaughters thirty warriors.
- Grendel attacks nightly and leaves Hrothgar in misery.