Open the file Online Classesby Education Level xls which contains data on the number of undergraduate and graduate students taking online classes in the United States in 2007 a Make a single graph to answer this question In 2007 what percentage of students taking online classes were undergraduate students and what percentage of students taking online classes were graduate students Paste you graph into your word document 2 points b Make a single graph to answer this question In 2007 what percentage of undergraduate students took at least one online class and what percentage of graduate students took at least one online class Paste your graph into your word document 2 points