I’m working on a Mathematics exercise and need support.

Fisheries and Oceans Canada, after having its funding gutted, begins to rely on unpaid interns to help gather data about mercury levels in Lake Erie. Because of your amazing swimming and diving skills (in addition to your hard-work ethic and knowledge of geography), you are selected for one of the internship positions in the Niagara Region. You are sent into Lake Erie just off of Crystal Beach to collect specimens of the Zebra Mussel (Dreissena polymorpha). You collect the following data: 。。。

all requirement in file