HELP! 50 points!!!

1- What does Hrothgar claim is the reason for Grendel's mother's attack? What about his explanation, and the language he uses, might be surprising considering he is talking about a supposed monster?

2- How does Beowulf reassure Hrothgar before he dives into the water to
face off against Grendel's mother?

3- How does Unferth participate in Beowulf's quest to fight Grendel's
mother in her underwater lair?