X22: noTeenSum

Write two methods in Java that implements the following logic: Given 3 int values, a, b, and c, return their sum. However, if any of the values is a teen--in the range 13..19 inclusive--then that value counts as 0, except 15 and 16 do not count as teens. Write a separate helper method called fixTeen() that takes in an int value and returns that value fixed for the teen rule. In this way you avoid repeating the teen code 3 times (i.e. "decomposition").

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