MINIMUM WAGE AND THE EMPLOYMENT STANDARDS ACT

QUESTION:    It seems like I have been waitering for half my life.  Finally I am getting around to asking a few questions.  Is it true that waiters have a lower minimum wage than everyone else?  In addition, my employer often schedules me for a four hour shift and then sends me home after an hour if it is not busy.  Shouldn’t he have to pay me for the four hours I was scheduled for?