1. What is the rule h*x = x*h called? a) Commutativity rule b) Associativity rule c) Distributive rule d) Transitive rule AnswerAnswer: a [Reason:] By definition, the commutative rule h*x=x*h. 2. For an LTI discrete system to be stable, the square sum of the impulse response should be a) Integral multiple of 2pi b) Infinity…