Q$6.$ Let $x(e^j)$ denote the DTFT of a length $-7$ sequence given by

Evaluate the following functions of $x(e^j)$ without computing the transform itself:

a$)x(e^{j0})$

b$)x(e^j)$

c$){\displaystyle \underset{-}{\overset{}{}}}x(e^j)d$

d$){\displaystyle \underset{-}{\overset{}{}}}|x(e^j){|}^{2}d$

e$){\displaystyle \underset{-}{\overset{}{}}}|\frac{dx(e^j)}{d}{|}^{2}d$