Homework$-1$

Suppose that $x(t)$ is a random process with

$m(t)=3,R(t_1,t_2)=9+4e^{-0\mathrm{.}2|t_1-t_2|}$

Find the mean, variance and the covariance of the

random variables $z=x(5)$ and $w=x(8)$