Homework: No Teen Sum

Imported By: Geoffrey Challen

/ Version: 2021.7.0

/ Adapted from CodingBat

Given three positive int values, 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 a teens. Complete and use the private helper method fixTeen and use it to apply the teen rule so that you don't need to repeat the same code three times.