Question 3. (20 Points) Consider a two-level memory where T is the access time to level 1, and T2 is the access time to level 2. Assume that if a word to be accessed is in level 1, then the processor accesses it directly. If it is in level 2, then the word is first transferred to level 1 and then accessed by the processor. Level 1 has an access time of 0.03 us (us = 10 sec), level 2 access time of X uus. a. If the average access time to this system is 0.16us, and the hit ratio is 0.7, What is the access time X of level 2? b. What is the hit ratio that will make the average time = 0.045 us (uus = 10^sec)