$```$

a $\backslash$x $=($vector of$)$ samples of the chirp signal

$\%$ tt $=$ vector of time instants for t$=0$ to t$=$dur

f

if$($ nargin Allow optional input argument

fsamp $=11025$;

end

$```$

As a test case, generate a chirp sound whose frequency starts at $2500$ Hz and ends at $500$ Hz ; its duration should be $1\mathrm{.}5$ s $.$ Listen to the chirp using the soundsc function. Include a listing of the mychirp.m function that you wrote.