Question: Exercise - 4 . Y n is an random process, and Y 0 = 0 , Y n = i = 1 n x i

Exercise-4.
Yn is an random process, and Y0=0,Yn=i=1nxi
here xi is an random variable, each xi are independent
and its outcomes are {-1,1}, besides
P{xi=-1}=q,P{xi=1}=p
Find E[Yn] and Var[Yn]
Exercise-4. Yn is an random process, and Y0=0,Yn=i=1nxi here xi is

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