1. Give an example in which a working set-page-replacement strategy would replace a the best possible page b the worst possible page 2. The key to the proper and efficient operation of the pege fauli-frequency (PFF) page replacement strategy is the selection of ihe thresholf interfault time values. Answer each of the following questions a. What are the consequences of selecting too large an upper value? b. What are the consequences of selecting too small a lower value? c. Should the values remain fixed, or should thay be adfusted dynamially? d. What criteria woutd you use to adjust the values dynamicall