First, we always have to list them from least to greatest: 3,7,10,11,12,14,15,17,17,21.
A. I attached an image of the cumulative frequency table.
B. I wasn't able to make a histogram since I can't find any templates or programs to create it on.
Part C:
Mean: 12.7
Median: 26/2=13
Mode: 17
Range: 21 -3 = 18
Part D:
Minimum: 3
First Quartile: 10
Third Quartile: 17
Maximum: 21
E. I can't a program again, but I can help you over a call if you'd wish.
Part F:
40th Percentile: 0.31