(Solved): 2]: 1. If a signal x(t) is an odd symmetric signal, then y(t)=4x(t) is: (a) Odd symmetric. (b) E ...

2]: 1. If a signal $x(t)$ is an odd symmetric signal, then $y(t)=?4x(t)$ is: (a) Odd symmetric. (b) Even symmetric. (c) Neither even nor odd symmetric in general. 2. $x(t)=\cos (t)$ is even symmetric. Phase-shifting $x(t)$ to get $y(t)=x(t?a)$. For what value of $a$ is $y(t)$ odd symmetric? (a) 0 (b) $\frac{?}{2}$ (c) $?$