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array_mystery6

Language/Type: PHP array mystery arrays
Author: Melissa Hovik (on 2018/01/05)

Consider the following function: 

function array_mystery6($arr) {
    for ($i = 1; $i < count($arr) - 1; $i++) {
        $arr[$i] = $arr[$i - 1] + $arr[$i + 1];
        if ($arr[$i] % 2 == 0) {
            $arr[$i] = $arr[$i] / 2;
        }
    }
    return $arr;
}

For each array below, indicate what the returned array's contents would be after the function array_mystery6 were called and passed that array as its parameter.

[42]
[1, 0, 0, 1, 0]
[1, 3, 4, 6]
[8, 13, 0, 6, 11, 2]
[1, 1, 2, 3, 5, 8, 13]

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