Need help in Operating Systems. Please answer 4,5,6 below. Thanks.

Under any page replacement policy, there will always be fewer page fautts if we have more phrysical frames. True False Question 5 Which of the following page replacement policy is the optimal one in term of minimizing the number of page faults? Replace page that will not be used for longest period of time. Peplace page that has been least frepuently used. Peolace poge that has not been used for longeit period of time. Replace page that has been in the page table for langest period of time. Question 6 We have the following reference strings 34.321.2221234.22. Pight now the page reference reaches at the one in red 22. The vPNs have been allocated to physical frames in the following way: \begin{tabular}{|l|} \hline 3 \\ \hline 4 \\ \hline 1 \\ \hline \end{tabular} Which VPN will be replaced for the highilighted 22 under the OPT policy