Answer:
George is on a fixed interval
Mai Ling is on a fixed ratio
Step-by-step explanation:
A schedule is the delivery rate or frequency of a booster.
A fixed interval refers to the amount of time the reinforcement delivery rate has occurred over a predictable period of time, such as George, who is paid weekly for his work.
A fixed ratio occurs when rewards are delivered on a consistent schedule basis. As in the case of Mai Ling who gets paid after certain completed tasks, which corresponds to the number of tasks she performs to receive certain reinforcement.