In 2017, a survey was conducted comprising nationals from different countries across the globe. Upon the question of how aerosols affect the climate, 28.0% responded in favor of albedo effect, 33.5% supported absorption of sunlight, and 29.5% stated altering occurrence of clouds. Of the remaining, 3.1% suggested a complex mechanism that happens while 5.9% indicated being unaware of the reason.

a. Display this information in a bar graph.

b. Which is easier to sketch relatively accurately, a bar chart or a pie chart?

c. What is the advantage of using a graph to summarize the results instead of merely stating the percentages for each source?

d. What is the modal category?