(c) What is the expectation of X^2?

8. (5% each, 20% in total) Yes/No questions. No need to state reasons. (a) Consider two events \( E_{1} \) and \( E_{2} \). Is the statement "if \( E_{1} \) and \( E_{2} \) are disjoint, then \( E_{1} \) and \( E_{2} \) are independent" true?

(c) What is the expectation of \(X^2\)?

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