Given a discrete$-$time signal x$($n$)=\{1,-2,3,6\}.$

Determine the following signal and then use Scilab to draw the original signal x$($n$)$ and the manipulated signal yi$($n$).$ Each pair of plots will be display in a single window. Please use title$(),$ xlabel$()$ and ylabel$()$ to represent the name of each plot.

a$.$y$1($n$)=$ x$(-$n$)$

b$.$y$2($n$)=$ x$($n$+3)$

c$.$y$3($n$)=2$x$(-$n$-2)$