chick grammar, if any word not acadmic please chang it. this is important assighnment. please do your best. I am ganna give you the reference for the seconed part 2Q.  CDC.  2013.  <em>Facts about Benzene</em>. Retrieved from: <a href="http://www.bt.cdc.gov/agent/benzene/basics/facts.asp">http://www.bt.cdc.gov/agent/benzene/basics/facts.asp</a>. Also, please chick the reference. Thank You.   