Explain the function of the Page Map Table in all of the memory allocation schemes described in this chapter that make use of it$.$ Explain your answer by describing how the PMT is referenced by other pertinent tables in each scheme.If a program has $471$ bytes and will be loaded into page frames of $126$ bytes each $($assuming the job begins loading at the first page $($Page $0)$ in memory$),$ and the instruction to be used is at byte $132,$ answer the following questions:How many pages are needed to store the entire job?Compute the page number and exact displacement for each of the byte addresses where the desired data is stored.