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A computer password consists of: • letters {a, A, 6, B, ...,2,Z}, • digits {0, 1,...,9),...

A computer password consists of: • letters {a, A, 6, B, ...,2,Z}, • digits {0, 1,...,9), or = 16 • special characters {!,@,#,$,%}. In addition, a password must • contain at least one upper case letter, • contain at least one special character. How many passwords of length 8 are possible?

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