The Attempt at a Solution
I'm fine with parts a) and b)
However I don't understand what part c) is asking me to do. How do I 'measure' an operator?
There are only two things I can think to do:
1. Find the expectation values of A for <Φ1|A|Φ1> and <Φ2|A|Φ2>
2. Find the operator eigenvalues of A
I know how to perform these tasks, so the only thing I'm confused about is the wording. I don't really understand what is meant when it talks about 'measuring' an operator.