Answer:
see the second attachment
Explanation:
You're being asked to draw a histogram of the frequency of digits in the first 100 digits of pi. If you were looking only at the first 6 digits, 3.14159, you would see that the digit 1 appears twice, the digits 3, 4, 5, and 9 appear once each, and the remaining digits don't appear at all. The graph would show points (1, 2), (3, 1), (4, 1), (5, 1), (9, 1) and (0, 0), (2, 0), (6, 0), (7, 0), (8, 0).
One way to draw the histogram is to simply mark the next higher bar on the graph each time you encounter a digit as you read the number. The marks on the first attachment show what the graph would look like after the first 6 digits are accounted for.
The graph can be drawn several ways. One is to make it a bar graph, with a vertical bar at each position, the height of which is the number of times the digit appears in the number given. The second attachment simply marks where the top of such a bar would be.
In the first 100 digits of pi, the digit 9 appears 13 times, the most of any digit.
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For the sum of digits, you can add up the digits as you go, or you can multiply the digit's value by the number of times it appears, and total those products. I find that easier than doing 99 sums.