Q$1.$ Use data.txt$,$ which is posted under "Course Materials". The first row of data.txt is the description for each column. Creat the following figure via the steps decribed in $(1)(8)$ below. You need to submit only the final figure in one page. There is no need to attach your matlab files.

$(1)$ Compute the annual inflation rates for ${2000\mathrm{.}5}^{}2013\mathrm{.}5$ by taking log difference of CPI. That is$,$ In flation $t=[()t)t-12.$

$(2)$ Compute the growth rates for ${2000\mathrm{.}5}^{}2013\mathrm{.}5$ by taking log difference of Production Index $($SA$).$ That is$,$ Growth $h_t=100[ln(I{P}_t)-ln(I{P}_{t-12})].157-3035],$ and $\left[\begin{array}{cccc}0& 1& 0& 1\end{array}\right]$ for each panel.

$(4)$ The fontsize is $15$ for the title, $10$ for the ylabel, and $14$ for the text inside the last panel.

$(5)$ The linewidth is $1$ in the first panel and $3$ in the second panel.

$(6)$ If needed, you can rotate the ylable, for example, by a command, ylabel$(\text{'}$Percent$\text{'},$ 'rot',$90)$;

$(7)$ Xtick is marked for January.

$(8)$ Use box on$/$off$,$ grid on$/$off wherever necessary.