Answer the following questions by identifying the correct schedule of reinforcement.

1. Mrs. Blass is tired of her students not being prepared for class each day. She knows that they are hard-working seniors who value getting an A in the class, and she wants to set up a schedule of work so they study hard and consistently. She schedules pop quizzes. Only she knows when those quizzes will be given. Assuming the students find the grade of A or B to be reinforcing, what schedule of reinforcement is at work here?

2. Sally is trying to break up with her boyfriend. She refuses to text him back 90% of the time when he texts her. Sometimes, this means she will not text back after10 or 20 texts. Finally, she gets frustrated (and lonely) and will text back but only to say 'hi' or 'good luck at your football game' or other seemingly meaningless comments. This process continues for months, where he texts her a few times every day, and eventually she will break down and answer. The reason the boyfriend is still texting so long after the breakup is due to which schedule of reinforcement?

3. Amom and dad are teaching 2-year-old Johnny how to use the toilet. Every time heurinates even a little amount in the toilet they jump up and down and he gets a bite of his favorite cookie. This is an example of which schedule of reinforcement that is often used when first teaching a skill?

4. Manuel is thinking about opening a new coffee shop in town. He is wanting to compete with the big companies in town, but he is not sure how to draw in the crowds. To start, he offers reward points. When customers come in, they get a star for every $5 they spend. Once they have spent $50, they receive a free medium drip coffee. Manuel is hoping to lure in repeat business through which schedule of reinforcement?