Please solve the following in matlab and share the code. I understand how to do it on paper but am having trouble making a code to do it$,$ thank you!

Determine the roots of $f(x)=-12-21x+18x^2-$

$2\mathrm{.}75x^3$ graphically. In addition, determine the first root

of the function with $($a$)$ bisection $($b$)$ false position $($C$)$ Newton$-$Raphson. Use initial guesses of $x_l=-1$ and $x_u=0$ and a stopping

criterion of $1\%.$