3. Let X; ~ Poi(1), i = 1, ...,n, be n = 20 independent Poisson r.v's. Hint: you may use E(Y) = > and Var(Y) = A, for a Poisson r.v. Y ~ Poi()). 3a. Use the Markov inequality to obtain a bound on Pr ()"_, X, > 30) (+0.05 is okay). Pr() , Xi > 30) 30) =