Assume a 2-level cache hierarchy with the following characteristics: h1 = .95, l1 = 1 s (access time, cache level 1) h2 = .04, l2 = 10 s (access time, cache level 2) h3 = .01, l3 = 100 s (access time, main memory) a) Show the effectiveness of the so-called memory hierarchy in reducing the access gap. b) What percentage of references send to the 2nd level cache are serviced by that level? c) In a quick observation, one can argue that a multi-level cache organization is not an effective means to reduce the access gap. Is this true? Justify your answer.