Mark who is 17 years old is not allowed to
gallivant anywhere. To ease his boredom, he decided to construct a file cabinet made up of
bamboo. He placed 32 strips of bamboo in the bottom layer, 20 strips in the third layer, 22 strips
in the fourth layer, and so on.

a. How many layers are there in the filing cabinet?
b. How many strips of bamboo should Mark do to construct the file cabinet?
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