Question 1 (2x5x3 Points = 30 Points): Consider the following page reference string: 8,7,6,8,5,7,6,4,3. 1. How many page faults would occur for the two page-replacement algorithms - OPT and LRU? 2. For each reference, show the content of the frames. 3. For each algorithm, show which reference gives a page fault. 4. Assume that the process has been allocated 3 frames and that initially all frames are empty. Show for each reference if there is a page fault or not. 5. Give the page fault RATE for two techniques. Page fault rate is defined as the percentage of references which resulted in page faults, in other words, number of page faults / number of references 100.