(20 Points) 2. The following is a page trace of a virtual memory based system. You have 3 pages of memory and they are managed using the page replacement policy specified. Show me the pages in memory after each page access and circle the pages that cause page t aults. Page Trace: 1 2 3 1 4 5 6 26 5 6 4 2 3 1 2 3 4 1 a) FIFO b) LRU c) OPT/VMIN