Write a MATLAB code to evaluate the output of the unknown system from

Semmlow Ex $5\mathrm{.}1($unknown$\_$sys$5\_1.$mat$$ code in appendix$)$ according to

$1)$ an impulse at $1$s $($i$.$e$.,0$ all other time$)$ and

$2)$ a unit step input beginning at $0\mathrm{.}5$s $($i$.$e$.,0$ before then$).$ The code should produce a single figure with two vertical subfigs, one for each input$/$output function pair. Both should have labeled x and y axes, titles, and demonstrate three normalized functions$/$waveforms in time. Start with the code provided in the Appendix below. Provide the code in Plain text as well.

Appendix:

$\%$unknown$\_$sys$5\_1$

function y $=$ unknown$\_$sys$5\_1($x$)$

$\%$ Function to simulate an unknown second$-$order system

A $=[1\mathrm{.}0-1\mathrm{.}98890\mathrm{.}9890]$;

B $=[\mathrm{.}1594\mathrm{.}03067\mathrm{.}1534]*\mathrm{.}0001$;

y $=$ filter$($B$,$A$,$x$)$;