To ensure others want to include you in future games, you should

show good sportsmanship
demand a good position
always lose to your opponent
play down to the level of your opponent

true

explanation:

a genogram (also known as a mcgoldrick-gerson study, a lapidus schematic or a family diagram) is a pictorial display of a person's family relationships and medical history. it goes beyond a traditional family tree by allowing the user to visualize hereditary patterns and psychological factors that punctuate relationships.

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