Which type of study would be used to diagnose sleep apnea?

A 26-year-old woman has taken an overdose of antidepressant medication. She is unresponsive and vomiting. Which one of the following is the best course of action?

A) Place the patient supine and suction for 15 seconds before applying oxygen with a nonrebreather mask. B) Turn the patient onto her side and suction until the airway is clear. C) Insert an oral airway, apply a bag-valve-mask device, then suction the airway. D) Use abdominal thrusts to clear the airway.

The distance between two "tic" marks is ________ sec

A) 3 B) 4 C) 5 D) 6