Industrial Hygiene and Toxicology

Hello, I will submit a file that has the case.
Note that, it’s a group work, therefore; I highlighted my part by yellow color,
which you have to answer question 3,4, and 5. into two pages, Please do not go more than two pages, and if you can make it a page and half that would be better also.

Read the scenario and give a good and clear explanation in your answers.