Let X be a random variable such that

$1$

$()$

$21$

P X i

n

$==$

$+$

for i $=$n$,$n $+1,...,1,0,1,$

$...,$ n what is V$($X$)?$Let $x$ be a random variable such that

$P(x=i)=\frac{1}{2n+1}$ for $i=-n,-n+1,$dots,$-1,0,1,$

dots,$n$ what is $V(x)?$