$3$a$)(5$ points$)$ Explain the notion of a context switch.

$3$b$)(5$ points$)$ What would happen if the context switch time were too long? Discuss your answer.

$4)(5$ points$)$ List the basic possible states for a process:

$5)(5$ points$)$ A system has several processes that request I$/$O services in long time intervals compared

with very short CPU service. For example, the processes request services that about $95$ percent of the

total service request time are I$/$O requests and only $5$ percent are CPU requests. What potential

problems can this system exhibit?

$6)(5$ points$)$ A system has several processes that request CPU services in long time intervals compared

with very short I$/$O service. For example, the processes request services that about $95$ percent of the

total service request time are CPU requests and only $5$ percent are I$/$O requests. What potential

problems can this system exhibit?

$7)(5$ points$)$ Is multiprogramming more useful in a multiuser system or a single$-$user system? Discuss

your arguments below: