I really really need help with my homework!!! Its mediator, mediation and third variable!

People who make more money, spend less time socializing with others. Time spent working could be a:a)    mediatorb)    moderatorc)    third-variable responsible for the association

Scenario: Teenagers with higher “screen time”, that is, who spend more time surfing the internet, watching TV or playing computer games risk, perform worse in exams than their peers who don’t, according to research by British scientists.

2. This relation is stronger on those who have lower IQs. Thus, IQ is a:a)    mediatorb)    moderatorc)    third-variable responsible for the association

3. It seems that time in front of a screen impairs teenagers’ reasoning and analytic capacities. This impairment is a:a)    mediatorb)    moderatorc)    third-variable responsible for the association

4. Teenagers from low income level families tend to spend more time surfing the internet, watching TV or playing computer games. Also, teenagers from low income level families tend to perform worse in school than their peers from higher income level families. Family income level would be a:a)    mediatorb)    moderatorc)    third-variable responsible for the association

5. It has been found that conservative college students tend to have more self-control than liberal college students. Past research has established that conservatives endorse a belief in free will more than liberals do. Past research has also established that people who believe in free will tend to have more self-control. Belief in free will is a:a)    mediatorb)    moderatorc)    third-variable responsible for the association

6. People who drive while using their cell phones tend to commit more driving errors. Those who have less experience driving are even more likely to commit driving errors. The moderator in this study is:a)    driving errorsb)    driving experiencec)    using cell phones