Describe each of the following sets by listing its elements: a. {x | x ∈ N and x2 − 5x + 6 = 0} b. {x | x ∈ R and x2 = 19} c. {x | x ∈ N and x2 − 2x − 8 = 0}} d. {x | x ∈ Z and x ∗ x = 4}

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A potential method of analysis

The complexity of the algorithm model emphasizes the potential method. This method is useful for examining a data structure's amortized time and space complexity.