Q$6.[20$ points$]$ Consider a demand$-$paging system with the following time measured

utilizations:

CPU utilization: $20\%$

Paging disk: $97\mathrm{.}7\%($demand$,$ not storage$)$

Other I$/$O devices: $5\%$

For each of the following, say whether it will $($or is likely to$)$ improve CPU utilization. Briefly

explain your answers.

a$.$ Install a faster CPU.

b$.$ Install a bigger paging disk.

c$.$ Increase the degree of multiprogramming.

d$.$ Decrease the degree of multiprogramming.

e$.$ Install more main memory.

f$.$ Install a faster hard disk, or multiple controllers with multiple hard disks.

h$.$ Increase the page size.