Answer for question 5 and 6

Does using Marijuana lead to other drugs?
Long-term studies of drug use patterns show that most high school students who use other illegal drugs have tried marijuana first. However, many young people who use marijuana do not go on to use other drugs. To explain why, here are a few theories:
Exposure to marijuana may affect the brain, particularly during development, which continues into the early 20s. Effects may include changes to the brain that make other drugs more appealing. For example, animal research suggests that early exposure to marijuana makes opioid drugs (like Vicodin® or heroin) more pleasurable.
Someone who is using marijuana is likely to be in contact with other users and sellers of other drugs, increasing the risk of being encouraged or tempted to try them.
People at high risk of using drugs may use marijuana first because it is easy to get (like cigarettes and alcohol).

What are the dangers of using marijuana?
Dangers in the immediate effects of marijuana include distortions of time and space perceptions and impaired coordination, all of which may be contributing to the increased risk of traffic accidents recently discovered. Particularly important for students to know about is the creation of difficulty thinking or problem solving and impairment of memory and learning. These difficulties can last for as long as four weeks after drug use.

Works cited
Want to Know More? Some FAQs about Marijuana. (n.d.). Retrieved July 03, 2016, from https://www.drugabuse.gov/publications/marijuana-facts-teens/want-to-know-more-some-faqs-about-marijuana

Watch Truth About Drugs Documentary Video & Learn About Substance Addiction. Get The Facts About Painkillers, Marijuana, Cocaine, Meth & Other Illegal Drugs. (n.d.). Retrieved July 09, 2016, from http://www.drugfreeworld.org/drugfacts/marijuana/on-the-road-to-drug-abuses.html

Marijuana. (n.d.). Retrieved July 03, 2016, from https://www.drugabuse.gov/publications/drugfacts/marijuana

Hidden Dangers of Marijuana. (n.d.). Retrieved July 09, 2016, from http://www.narconon.org/drug-information/dangers-of-marijuana.html