Consider the following page reference string: XXXXXXXXXX XXXXXXXXXX What are the last pages in main memory in their order, and how many page faults would occur for the following page replacement...

Consider the following page reference string: 1 2 3 4 2 1 5 6 2 1 2 3 7 6 3 2 1 2 3 6 What are the last pages in main memory in their order, and how many page faults would occur for the following page replacement algorithms? Assuming 4 frames.

A) FIFO

B) Optimal

C) LRU