Question: Consider the following reference string: 1 , 2 , 3 , 4 , 2 , 1 , 5 , 6 , 2 , 1 ,

Consider the following reference string:
1,2,3,4,2,1,5,6,2,1,2,3,7,6,3,2,1,2,3,6
How may page faults would occur for the following replacement algorithms assuming three frames?
LRU replacement

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