Lab9–PM Concentrations

Question 1:

on question 2 where it says "3.) Calculate the average monthly PM2.5 concentration for each month in 2010, and add to the table below."
Is this just the average of what is already on the table for each month?

Response:

You are asked to calculate the average concentration for each month and insert that into column “C”

Question 2:

The table is titled PM concentration, so I'm not sure what PM2.5 concentration is.

Response:

The data in column “0” are indeed PM2.5 concentrations