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a . The five inversions of the array [ 2 , 3 , 8 , 6 , 1 ] are: ( 2 , 1 )
a The five inversions of the array are:
b The array with elements from the set n that has the most inversions is the array sorted in descending order. It has nn inversions.
c The running time of insertion sort is proportional to the number of inversions in the input array. This is because each inversion corresponds to a pair of elements that are out of order and need to be swapped, and each swap takes constant time.
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