Expert power usually stems from
a. a person's ability to penalize the actions or behavior of another.
b. a superior's credibility with his or her subordinates.
c. a person's ability to influence the behavior of others by offering them something desirable.
d. a person's perceptions that his or her goals or objectives are similar to another's.
e. the belief that a certain person has the right to exert influence and that certain others have an obligation to accept it.

Option b.

Explanation:

the suction machine and tubing is the equipment that should be left behind and should be most easily accessible.

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.