(5.7.2) On October 20, 2011 the Elizabeth Warren campaign provided The Boston Globe with the data we used to draw Figure 5.5. The first bar in the chart shows the total dollar contributions to her campaign, broken down according to where the money came from (Massachusetts vs. out of state). The second bar shows the total number of donors, broken down the same way. (4 pts)

a. What was the average donation (per donor)?

b. What was the average donation from Massachusetts?

c. What was the average donation from outside Massachusetts?

d. Check that calculating appropriate weighted average of your answers in parts b and c gives the answer you found in part a.