Compute the surprise number $($second moment$)$ for the stream $3,1,4,1,3,4,2,$

$1,2.$ What is the third moment of the stream? If we randomly choose the variable

starting position as $3($i$.$e$.,$ the $3$rd position in the stream, the element $4)$ and $5$

$($i$.$e$.,$ the $5$ th position in the stream, the element $3)$ for the element $4.$ What is

the estimated second moment using the Alon$-$Matias$-$Szegety algorithm, if we

take the average of these two random choices?