How do I present the data in this table in four matrices?

Question

anonymous · Answer

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anonymous · Answer

That basically is an advanced matrix, though. I'm not sure why you would need to split it up.

anonymous · Answer

After I split it into four matrices I'm supposed to  find the combined amount of benzene, toluene, ethylbenzene, and xylene in mg/kg for each soil sample. 
And number 2) After 12 months of bioremediation, the levels of each component dropped to less than 0.05 mg/kg for each soil sample. Use matrices to calculate the minimum 
amount by which the level of each component for each sample dropped.

I can figure out how to do those, I just didn't know how exactly to split them up. My teacher is really finicky about how we do our work, so I definitely should split it up, even if it isn't necessary.

anonymous · Answer

Wait, do I split them up with each chemical (b, t, e, x) and just have four 5x1 matrices?