Gus is a non$-$exempt employee whose regular hours are $8$ am to $5$ pm with an hour off for lunch, five days per week. Which of the following is true

if Gus eats his lunch in the company cafeteria he must be paid for the hour he takes for lunch

if Gus eats his lunch at his desk and does work during his lunch hour, he must be paid for the hour worked if the employer know that he does this

if Gus eats his lunch at his desk and does work during his lunch hour, the hour worked must count toward whether he is entitled to overtime pay if the employer know that he does this

both b $.$ and c $.$

a$.$ and b$.$ and c$.$