c$.$ Which method is the following matlab code? Write the output of following

commands in MATLAB.

functionX.m file

function $x=$ function $x(B)$

$[m,n]=$size$(B)$;

for $i=1$:$m$

$B(i,$:$)=B\frac{i,\text{:}}{B}(i,i)$;

for $j=(i+1)$:$m$

$B(j,$:$)=B(j,$:$)+(-1)**B(j,i)**B(i,$:$)$;

end

end

$x=[]$;

$x(m)=B(m,n)$;

for $i=(m-1)$:$-1$:$1$

total $=0$;

for $j=(n-1)$:$-1$:$(i+1)$

total $=$ total $+B(i,j)**x(j)$;

end

$x(i)=B(i,n)-$ total;

end