How can I state an IRAC memo in this situation:

Mathias entered a martial arts training as a beginner in the state of New York. He signed waiver of immunity waiving his right to sue the martial arts school. The instructor moved him to intermediate after 3 weeks of training because he believed Mathias was ready to move up. However one of those matches in cage Mathias fought another intermediate Kim that had another better maneuvers for an intermediate student. Mathias didn't slap the floor and Kim kept squeezing him with his legs when they heard a noise of a broke bone The instructor called the ambulance and he helped Mathias. In the hospital he was diagnosed with broke hips and since he was ex veteran the US government is paying for all his medical bills. The lawyers of the martial school said they didn't violated any duty of care of Mathias and Mathias had assumed the "assumption of risk" when he signed up for the martial arts school also he signed the "waiver of immunity".

Narrow down a preliminary "issues/research strategies" memo. This memo should include a draft of your two questions presented.Present a list of legal authorities (cases, statutes) and provide a citation for each. Also briefly explain the relevance of each legal source you provide to an issue.

The research involves New York case law on "primary assumption of risk" in this type of fact situation. It is also about law related to waivers of liability for personal injury in this type of fact situation.