Which Sleep Disorder Is It?

Read each of the scenarios below and identify which sleep disorder is occurring in the situation.

Jacob is asleep and all of the sudden he sits up and screams at the top of his lungs. He then lays back down and goes back to sleep. The next morning he doesn%u2019t remember anything.
DISORDER:

You get home from a night out with your friends and hear your roommate talking to someone. You go into her room and see that no one is there. You ask her who she is talking to and she answers you, but continues talking. You carry on a conversation with her without her even waking up.
DISORDER:

Tammy has a very important work project due in a couple of weeks and she has been working on it nonstop since it was assigned. She is so worried because she knows her job depends on this project. She%u2019s finding lately that she cannot fall asleep until two or three o%u2019clock in the morning and then wakes up many times during the night.
DISORDER:

Tim is working with his lab partner, Jack, on a lab report that is due next week in class. They are in the library studying and working on the report when all of the sudden in the middle of the conversation Jack drops his head and falls asleep. After waking back up he continues the conversation as though nothing happened.
DISORDER:

Janet%u2019s father has had a problem with obesity for the past year or so. Lately, Janet%u2019s mother has been noticing that Janet%u2019s father stops breathing briefly during the night. She is getting concerned because it seems to be occurring more frequently.
DISORDER: