1. The problem statement, all variables and given/known data Let S be a set of things and let P be the set of subsets of S. For A,B in P, define A*B=[(S-A)intersection B] union [A intersection (S-B)] I'm suppose to show that (p,*) is commutative, find the identity, and given that A is a subset of S, find the inverse of A. How do i even start this? 2. Relevant equations 3. The attempt at a solution I need help starting it.