Depends on how fast he runs in a sitting. If he runs slow during the 20 minutes he isn't getting much done :D.
True because they are like man made pain killers that your body produces
You can socialize at events to gain experience in that area, you can join social media to gain experience(as long as it is a healthy environment) or you can do things with friends.
Social environment, her friends helped her stick to it
For a doctor incorrect test result could lead to a misdiagnosis witch could lead to the patient getting the wrong kind of help witch could ultimately lead to death.