The Excel file Stock Data contains monthly return data for four $(4)$ stocks. a$.$ Use these returns and the Matrix of Excess Returns to compute the Variance$-$Covariance Matrix for these four $(4)$ stocks. $($Do not use the varcovar VBA function$).$ b$.$ Use the Variance $-$ Covariance Matrix for these four $(4)$ stocks to compute the individual stock proportions for the Global Minimum Variance Portfolio $($GMVP$).$ c$.$ Calculate the Expected Return and Risk $($Standard Deviation$)$ for the Global Minimum Variance Portfolio $($GMVP $\backslash$begin$\{$tabular$\}\{|$c$|$c$|$c$|$c$|$c$|\}$

$\backslash$hline & $\backslash$multicolumn$\{4\}\{|$c$|\}\{$RETURNS FOR $4$ STOCKS$\}\backslash \backslash$

$\backslash$hline Month & Stock A & Stock B & Stock C & Stock D $\backslash \backslash$

$\backslash$hline $1$ & $16\mathrm{.}66\backslash \%$ & $7\mathrm{.}61\backslash \%$ & $5\mathrm{.}20\backslash \%$ & $2\mathrm{.}91\backslash \%\backslash \backslash$

$\backslash$hline $2$ & $-0\mathrm{.}72\backslash \%$ & $-0\mathrm{.}56\backslash \%$ & $4\mathrm{.}00\backslash \%$ & $4\mathrm{.}25\backslash \%\backslash \backslash$

$\backslash$hline $3$ & $2\mathrm{.}16\backslash \%$ & $-5\mathrm{.}94\backslash \%$ & $-0\mathrm{.}50\backslash \%$ & $5\mathrm{.}30\backslash \%\backslash \backslash$

$\backslash$hline $4$ & $13\mathrm{.}38\backslash \%$ & $14\mathrm{.}35\backslash \%$ & $9\mathrm{.}00\backslash \%$ & $-0\mathrm{.}88\backslash \%\backslash \backslash$

$\backslash$hline $5$ & $10\mathrm{.}56\backslash \%$ & $6\mathrm{.}54\backslash \%$ & $1\mathrm{.}90\backslash \%$ & $3\mathrm{.}54\backslash \%\backslash \backslash$

$\backslash$hline $6$ & $-3\mathrm{.}93\backslash \%$ & $-0\mathrm{.}90\backslash \%$ & $-0\mathrm{.}40\backslash \%$ & $3\mathrm{.}76\backslash \%\backslash \backslash$

$\backslash$hline $7$ & $5\mathrm{.}85\backslash \%$ & $-1\mathrm{.}45\backslash \%$ & $-2\mathrm{.}30\backslash \%$ & $2\mathrm{.}94\backslash \%\backslash \backslash$

$\backslash$hline $8$ & $-2\mathrm{.}76\backslash \%$ & $10\mathrm{.}47\backslash \%$ & $2\mathrm{.}10\backslash \%$ & $2\mathrm{.}86\backslash \%\backslash \backslash$

$\backslash$hline $9$ & $5\mathrm{.}11\backslash \%$ & $-6\mathrm{.}24\backslash \%$ & $2\mathrm{.}40\backslash \%$ & $-1\mathrm{.}44\backslash \%\backslash \backslash$

$\backslash$hline $10$ & $1\mathrm{.}08\backslash \%$ & $-1\mathrm{.}44\backslash \%$ & $-6\mathrm{.}70\backslash \%$ & $-13\mathrm{.}12\backslash \%\backslash \backslash$

$\backslash$hline $11$ & $3\mathrm{.}74\backslash \%$ & $-13\mathrm{.}12\backslash \%$ & $1\mathrm{.}30\backslash \%$ & $2\mathrm{.}76\backslash \%\backslash \backslash$

$\backslash$hline $12$ & $2\mathrm{.}06\backslash \%$ & $2\mathrm{.}76\backslash \%$ & $2\mathrm{.}60\backslash \%$ & $-6\mathrm{.}39\backslash \%\backslash \backslash$

$\backslash$hline $13$ & $-4\mathrm{.}55\backslash \%$ & $-6\mathrm{.}39\backslash \%$ & $-2\mathrm{.}50\backslash \%$ & $17\mathrm{.}24\backslash \%\backslash \backslash$

$\backslash$hline $14$ & $17\mathrm{.}46\backslash \%$ & $17\mathrm{.}24\backslash \%$ & $9\mathrm{.}80\backslash \%$ & $-2\mathrm{.}66\backslash \%\backslash \backslash$

$\backslash$hline $15$ & $-0\mathrm{.}45\backslash \%$ & $-2\mathrm{.}66\backslash \%$ & $-0\mathrm{.}70\backslash \%$ & $18\mathrm{.}13\backslash \%\backslash \backslash$

$\backslash$hline $16$ & $-1\mathrm{.}81\backslash \%$ & $18\mathrm{.}13\backslash \%$ & $-0\mathrm{.}30\backslash \%$ & $-15\mathrm{.}88\backslash \%\backslash \backslash$

$\backslash$hline $17$ & $-11\mathrm{.}98\backslash \%$ & $-5\mathrm{.}49\backslash \%$ & $-9\mathrm{.}00\backslash \%$ & $35\mathrm{.}06\backslash \%\backslash \backslash$

$\backslash$hline $18$ & $-2\mathrm{.}09\backslash \%$ & $-0\mathrm{.}53\backslash \%$ & $-4\mathrm{.}90\backslash \%$ & $21\mathrm{.}97\backslash \%\backslash \backslash$

$\backslash$hline $19$ & $12\mathrm{.}84\backslash \%$ & $3\mathrm{.}01\backslash \%$ & $-0\mathrm{.}40\backslash \%$ & $11\mathrm{.}46\backslash \%\backslash \backslash$

$\backslash$hline $20$ & $-2\mathrm{.}37\backslash \%$ & $11\mathrm{.}90\backslash \%$ & $6\mathrm{.}40\backslash \%$ & $29\mathrm{.}49\backslash \%\backslash \backslash$

$\backslash$hline $21$ & $9\mathrm{.}71\backslash \%$ & $0\mathrm{.}00\backslash \%$ & $2\mathrm{.}70\backslash \%$ & $14\mathrm{.}75\backslash \%\backslash \backslash$

$\backslash$hline $22$ & $-1\mathrm{.}77\backslash \%$ & $11\mathrm{.}30\backslash \%$ & $4\mathrm{.}40\backslash \%$ & $11\mathrm{.}55\backslash \%\backslash \backslash$

$\backslash$hline $23$ & $5\mathrm{.}86\backslash \%$ & $17\mathrm{.}59\backslash \%$ & $7\mathrm{.}20\backslash \%$ & $7\mathrm{.}14\backslash \%\backslash \backslash$

$\backslash$hline & & & & $\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$