Three sets P, Q, and R under the universal set U = {1, 2, 3, 4, 5, 6, 7} are given as\[\] P = {2, 5, 7}, Q = {1, 2, 3, 4, 5}, R = {5, 6, 7}.\[\] Which of the following statements is incorrect with respect to the given sets?

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