on top of this plot, also plot the results of MATLAB spline interpolant using built$-$in

function $$spline$($use help to learn more on spline command$)$

zz $=$ linspace$(0,-16\mathrm{.}1)$;

TS $=$ spline$($z$,$T$,$zz$)$;

plot$($zz$,$TS$)\%$select a different color if you like