A demand paging scheme uses $8$ K byte pages and $8$ Kbyte frames. Three users are

running spreadsheet applications. User I has a $20$K data file, User II has a $6$K data file

and user III has a $10$K data file. The spreadsheet program uses $30$ K and is shared as

the starting pages of each user $($Data pages for each user follow the shared spreadsheet

pages$).$ Assume that six frames are available, and allocated as shown:

a$-$How many pages are used by the spreadsheet program?

b$-$Write down the page frame table for User I:

c$-$Write down the page frame table for User II:

d$-$Write down the page frame table for User III:

e$-$What is the amount of internal fragmentation?