What was the difference in the sobriety test before and during

First video:   https://www.youtube.com/watch?v=q-9mXNrW7zc

Question 1: What was the difference in the sobriety test before and during the use of the impairment goggles?

Question 2: Buzzed driving is drunk driving. People cannot accurately rate how drunk they really are. Why is it important not to drink and drive?

Second video: https://www.youtube.com/watch?v=gwuwrRK-I2Y 

Question 3: Define atherosclerosis.

Question 4:  Name four carcinogens (cancer causing agents) contained in cigarettes.

Question 5:  List three types of cancer associated with smoking cigarettes.