Let K1, K2 , . . . denote a sequence of iid Bernoulli (p) random variables. Let

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Let K1, K2 , . . . denote a sequence of iid Bernoulli (p) random variables. Let M = K1 + ∙ ∙ ∙ Kn.
(a) Find the MGF ϕK (s).
(b) Find the MGF ϕM (s).
(c) Use the MGF ϕM (s) to find E[M] and Var[M].
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