environment activities 9

I have chapter 3 and chapter 13 needed to be answered(couple pages) the questions in the 2 files named with ch3 and ch13 also you need to use the attachment with name (Vostok data for lab) to answer ch13 at least.  they are only couple pages to be answered. Please I need excellent work on it because my grade is kind of low so far and I want to increas it.

Du in 18 hours from now for both

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