solved I’m trying to learn for my Psychology class and I’m

I’m trying to learn for my Psychology class and I’m stuck. Can you help?

Behavior modification most often is the result of operant conditioning in which a combination of reinforcement and punishment are used to decrease the presence of an unwanted behavior and to replace that behavior with a new desired behavior.  
After reading the chapters on reinforcement and punishment create a behavior modification strategy to apply to one of the following scenarios.  Remember – as part of this plan you must discuss how you will eliminate the negative behavior and then encourage the development of a new positive behavior. Pick one Discussion 

Your 4 year-old son throws himself on the ground screaming every time he does not get his way.
Your 10 and 12 year-old daughters have been fighting with each other and are starting to get out of hand.
You are a 4th grade teacher who is dealing with a student who is very fidgety and talkative during class when you are trying to teach.
Your 16 year-old has now missed curfew on three different occasions without calling or providing a good explanation as to why.