1) Consider a system with 2 level cache. Access times of Level 1 cache, Level 2 cache and main memory are 10ns, 100ns, and 500ns, respectively. The hit rates of level 1 and Level 2 caches are 0.7 and 0.8, respectively. What is the average access time of the system ignoring the search time within the cache? [5 Mark] 11) Design 256 x 8-bit RAM using 256 x 4 - bit RAM (5 Mark]