Step-by-step solution for Arith Geo

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This challenge requires you to determine if the integers in an array follow either an arithmetic or geometric sequence. An **arithmetic** sequence is one where the difference between each successive pair of integers is constant, for example in the array [2, 4, 6, 8] the difference between the integers is always 2. A **geometric** sequence is one where each element in the array is the product of the previous integer multiplied by some constant or ratio, for example in the array [3, 9, 27, 81] each element is a result of the previous element multiplied by 3.
A simple solution to this challenge involves checking the difference between each pair of integers.

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