Plot each of the functions below over the range specified. Produce four plots on the same page using the subplot command.

$($a$)f(x)=|x-1|$ for $-3x3.($Use abs in MATLAB.$)$

$($b$)f(x)=\sqrt[\phantom{2}]{|x|}$ for $-4x4.($Use sqrt in MATLAB.$)$

$($c$)f(x)=e^{-x^2}=$exp$(-x^2)$ for $-4x4.($Use exp in MATLAB.$)$

$($d$)f(x)=\frac{1}{10x^2+1}$ for $-2x2.$