python

import multiprocessing

import os

import time

# A function to simulate I$/$O$-$bound task with a system call $($simulates waiting for I$/$O$)$

def io$\_$bound$\_$system$\_$call$\_$worker$($name$)$:

print$("$Demonstrating an I$/$O$-$bound task"$)$

print$($f$"$Process $\{$name$\}($PID: $\{$os$.$getpid$()\})$ is starting $($I$/$O$-$bound task$)...")$

# Simulate system call for I$/$O$-$bound task

# TODO$-1$:

# $1-$ Print "Process $\{$name$\}$ is entering system mode by a system$-$call"

# $2-$ Check the type of operating system.If it$$s posix, the system is Unix $-$ like$($Linux$,$ macOS$).$

# If it$$s not, assume it$$s Windows.

# $3-$ execute a system shell command to list directory