Find the least element of each of the following sets, if there is one. If there is no least element, enter "none". a. {n EN:n²-2 ≥ 4}. b. {n EN: n²-6 € N}. c. {n² +5:n € N}. d. {n EN: n=k² + 5 for some k € N}.

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Q: b. Find the expected frequency of students choosing the History category and obtaining 11 to 20…

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