If A and B are both Hermitian, which of the following three operators are Hermitian? (a) i(AB-BA) Chapter 4 Preparatory Concepts. Function Spaces and Hermitian Operators (b) (AB - BA o Âľ + ß (c) 2 (d) If Āis not Hermitian, is the product At A Hermitian? (e) If A corresponds to the observable A, and ß corresponds to B, what is a "good" (i.e., Hermitian) operator that corresponds to the physically observable product AB?