Exercise$17$: Your task is to put these values into the following categorical bins: unknown, $17$ and under, $18-25,26-35,36-45,46-55,$ and $56+.$

The category labels should exactly match the above.

Missing values should be replaced with the unknown category

To make things easier and avoid ambiguity, let's say that any value with text, even if we could determine the age, will be binned with the unknown category. For example: sixty$-$nine should be coded as unknown, $45-55$ should be coded as unknown, $59$ on the day after Halloween should be coded as unknown, etc.