$(10$ Points$)$ For problem $1$ above, numerically integrate the EOM using RK$4$ and the following values and initial conditions:

$m=4kg,d=1\mathrm{.}75m,L=1\mathrm{.}6m,h=1\mathrm{.}0m,k_A=30\frac{(N)}{(m)},k_C=90\frac{(N)}{(m)}$

$(0)=25$deg,$x(0)=0\mathrm{.}75m,{}^{}(0)=0\mathrm{.}0ra\frac{d}{s},x^{}(0)=0\frac{m}{s}$

To make it easier use matrix inversion to solve for the system of equations. Don't expand the full equations, rather let MatLab do the matrix multiplication within your derivatives routine.