Problem # $1$

Two random processes $x(t)$ and $Y(t)$ are given by

$x(t)=$Acos$(t+),Y(t)=$Asin$(t+)$

where A and $$ are constants and $$ is a uniform r$.$v$.$ over $(0,2).$ Find the cross$-$correlation function of $x(t)$ and $Y(t)$

Problem # $2$

Problem # $5$

The discrete$-$time system shown in Fig. $6-6$ consists of one unit delay element and one scalar multiplier