Practice · 4 of 4

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CHALLENGE

Difficulty: beginner+25 XP

Implement static (int Count, int Total, double Average) Stats(IEnumerable<int> nums) (empty/null → (0, 0, 0.0)), static bool AllPositive(IEnumerable<int> nums) (empty → true — vacuous truth), and static int FirstBig(IEnumerable<int> nums, int threshold) — first element > threshold or -1 when none.

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