I need solutions to these 2 questions. Also please write on paper clearly. Thank you

24. [Markov inequality] If X 2 0, i.e. X takes only nonnegative values, then for an a > 0, we have P ( X 2 a) S E(X) a27. Let X be a random variable with mean 11 and variance 9. Using Tchebysheff's theorem, find (a) a lower bound for P(6 C)