To solve this series, let's analyze the given patterns:

9 = 4, 21 = 9, 22 = 9, 24 = 10, 8 = 5, 7 = 5, 99 = 10, 100 = 7

From the given patterns, we can observe the following:

1. The right side of each equation doesn't seem to follow any specific pattern.
2. The left side of each equation seems to correspond to the number of letters in the English spelling of the number on the right side.

Using this pattern, we can determine the missing values in the series:

16 = 7 and 17 = 9

Therefore, the correct answer is C) 16 = 7 and 17 = 9.

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