As a part of a research, natasha initially had difficulty falling asleep in the sleep lab, but finally drifted into sleep and was not awakened when a student researcher knocked a can of soda off the desk. the electroencephalograph (eeg) is displaying theta waves with occasional sleep spindles. the researchers feel confident that natasha is:

Expalined

Explanation:

When electroencephalograph (EEG) is displaying theta waves with occasional sleep spindles, the  patient is in deep relaxation and in the second stage of sleep where there is a dominance of theta waves and occasional burst of sleep spindles. In this stage small distubances and sound does not break the sleep. In addition appearance of K- complexes is often associated with stage two sleep.

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.