The following matters were not addressed specifically in the text. However, if you understand the concepts of Layer 1 and Layer 2 standards, in each case, give your answer and explain your reasoning. a) Is absorptive attenuation a Layer 1 or Layer 2 concern? b) Is media access control a Layer 1 or Layer 2 concern? c) Is MIMO a Layer 1 or Layer 2 concern? d) Is 802.11ac a Layer 1 or Layer 2 standard:? e) Is 802.11r a Layer 1 or Layer 2 standard