Answer the question and explain in detail please, I don't want an answer with 1 sentence and done.

Ka'Shana is a trained boxer. One night while she is sleeping she hears a scream for help coming from the apartment next to her. She jumps out of bed and rushes to the aid of her neighbor. The door is unlocked so she is able to enter the apartment. She fends off the husband who was attacking his wife. In doing so Ka'Shana caused injuries to him. Later the husband wants to prosecute Ka'Shana for trespass and assault. What defenses will be available to Ka'Shana? Include all that apply.