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4. (5 Points) The following is another merge sort top down implementation, what is the running time and space complexity for this implementation in big-0? Briefly explain your answer. public static 〈T extends Comparable〈 T> > void sort2(T[] a) { sort2(a, , a.length - 1); @Suppresswarnings (unchecked) private static <T extends Comparable<T>> void sort2(ΤΠ a, intlo, int hi) { if (hi (z lo) return; T[] aux- (TLD new comparable[a,length]; int mid- (10 + hi) / 2; sort2 (a, lo, mid); // Sort left half sort2(a, mid + 1, hi); /I Sort right half merge (a, lo, mid, hi, aux);

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int mid (Jothi/2 Morg Sost 1s not in-place

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