Smoking Supervisor

You are the office supervisor for a respected consulting firm in Saskatoon. You supervise four administrative professionals. The office hours are from $8$:$00$ a$.$m$.$ until $4$:$30$ p$.$m$.$ five days a week. All your employees respect the established office hours and the allotted time for lunch. In addition to lunch, everyone is allowed two $30-$minute refreshment breaks.