Q$2.$ Given that $x[n]$ has Fourier transform $x(e^j),$ express the Fourier transforms of the following signals in terms of $x(e^j)$ :

$($a$)$

$y[n]=x[1-n]+x[-1-n]$

$($b$)$

$y[n]=\frac{x^{**}[-n]-x[n]}{2}$