(b) The bar chart is not accurately drawn, because we note that some shadows were added around the bar.
This makes the bars less accurately drawn, because it makes the bars look larger than they actually are.
The bar chart is more interestingly to look at, because it is easier to determine the differences among the categories in a bar chart.
For example, we note that the blue (One Day) and red slice (A Few Days) in the pie chart are of similar size, which makes it hard to compare those two categories in the pie chart. However, we do not have this issue in the bar chart and thus the bar chart is more interestingly to look at.
Answer
(a) No, add another category "Other" with a percentage of 7%
(b) No
(c) Bar chart
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