B.10 [10/10/15] Consider a two-level memory hierarchy made of L1 and L2 data caches. Assume that both caches use write-back policy on write hit and both have the same block size. List the actions taken in response to the following events:

a. [10] An L1 cache miss when the caches are organized in an inclusive hierarchy.

b. [10] An L1 cache miss when the caches are organized in an exclusive hierarchy.

c. [15] In both parts (a) and (b), consider the possibility that the evicted line might be clean or dirty.