P$1.$ Consider the random signal $x(t)=$Acos$({}_{c}t+).$A and ${}_c$ are constants and $$ is a random variable that is uniformly distributed over the interval $(0,\frac{}{2}).$ Is $x(t)$ WSS$?$

P$2.$ The PSD of an argotic random signal $x(t)$ is

$P_x(f)=\{\begin{array}{cc}\frac{1}{B}(B-|f|),& |f|0\\ 0,& \text{o}\text{t}\text{h}\text{e}\text{r}\text{w}\text{i}\text{s}\text{e}& \end{array}$

Find $x_{rms}$ and $R_x()$