Consider a program that performs the following steps repeatedly:

$1.$ Use the CPU for $4$ milliseconds.

$2.$ By issuing an I$/$O$,$ use the disk for $14$ milliseconds.

$3.$ Use the CPU for $10$ milliseconds.

$4.$ By issuing an I$/$O$,$ use network for $18$ milliseconds.

Assume that each step depends on data obtained from the previous step $($e$.$g$.,$ step $3$

cannot start before step $2$ is completed. Also assume that each resource $($CPU or disk

or network$)$ can be used by one process at a time