Question $7($a$)(5$ points$)$: Calculate the total time spent by waste collection crew in a day if their truck collects $3$ loads per day: truck time from garage to the collection route is $45$min., actual time collecting $3$ loads is $4\mathrm{.}5$ hours, one way time to drive truck from collection route to disposal facility is $30$min, time from disposal facility to garage is $45$min., and crew breaks and traffic jams amount to $1$ hour.