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• 1997, Exam 4, Problems 1, 2, and 3
• 1997, Exam 4, Problems 4 and 5
• 1997, Exam 4, Problems 6 and part of 7
• 1997, Exam 4, The rest of problem of 7
• 1997, Exam 4, Problems 8 and 9
• 1997, Exam 4, Problem 10