• In Figure 9, the article shows two pie charts... one with all transmission methods and one with known transmission methods. To the casual reader who may not know/understand that Figure 9b is a subset of Figure 9a, there could be some confusion as to what each chart means... what would you do to make the charts easier to read to the casual reader?
• What are your opinions of the charts in Figure 10 showing known and null data?

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