R: read an existing course$$s information

$($a$)$ Prompt the user for a course department and course number: $($e$.$g$.,$cs $3423)$

Enter a department code and course number:

$($b$)$ Search for the specified course using the provided department and number $($e$.$g$.,$cs

$3423).$

$($c$)$ Print the course information in the following format:

Course department: dept$\_$code dept$\_$name

Course number: course$\_$num

Course name: course$\_$name

Scheduled days: course$\_$sched

Course start: course$\_$start

Course end: course$\_$end

Credit hours: course$\_$hours

Enrolled Students: course$\_$size

$($d$)$ If the course is not found, print the following error instead and continue with the script.

ERROR: course not found