answer:This may be over simplified but “help others before yourself” works effectively. as it meets all three formulations. It can be applied universally “all able should help others before themselves”. Your “end” is the assistance of another, the means are your own actions. You are both legislator and subject in that you have assessed your end as capable of being universally applied while at the same time are subject to it as evidenced by your actions and for that matter the law itself. Btw, if this is for a class, I want to know what the response is!