13. In a 3-level memory hierarchy system, the hit time for each level is T1 = 5 ns (L1-cache) T2 = 200 ns (L2-cache) T3 = 600 ns (Main memory) The local hit rate in each level is H1 = 0.9 (L1-cache), H2 = 0.8 (L2-cache), and H3 = 1 (It is assumed that we can always find the data in main memory). If the average access time (ns) of this memory is K. What is the value of “{Round(K*123)} mod 5” ? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4