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4. Let Yn,n 2 0 be i.i.d. random variables with E[Y1] = 0, E[Y] = o?, and EY*] = a. Set So = 0

4. Let Yn,n 2 0 be i.i.d. random variables with E[Y1] = 0, E[Y] = o?, and EY*] = a. Set So = 0 and Sn =E Yk for n > 1. %3D %3D (a) Find E[S|Y Y]. (b) Find E[S|Yi,Yn]. .... n+1 ...

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