Write a Matlab function signalx that evaluates the following signal at an arbitrary set of

points:

x$($t$)=2$e

$0\mathrm{.}9$t

cos

$8\backslash$pi t $$

$2\backslash$pi

$3$

I$[2,3]($t$)3$I$[3,2]($t$)$

That is$,$ given an input vector of time points, the function should give an output vector with the

values of x evaluated at those time points. For time points falling outside the support of x$($t$),$

the function should return the value zero.