While shopping with his mother at Hooper

Bert can recover from Ernie because Ernie breached the duty of care of the hypothetically reasonable person.

Bert cannot recover from Ernie because Ernie is a minor.

Bert can recover from Hooper's if the store has failed to frequently inspect and clear the floor of foreign objects.

If Hooper's did not have actual knowledge of the banana peel it cannot be held liable.