Please work out how show all work using pseudocode to answer

Please work out how show all work using pseudocode to answer! Thanks!

How many interchanges take place when sorting the following numbers in descending order, using the bubble sort technique?

6 9 5 8

Pass1: 9 6 8 5 => 2 interchange ((6,9) and (5, 8))
Pass2: 9 8 6 5 => i interchange ((6, 8))

So, total interchange = 3

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