Willlongrightarrow Problem $8$: For the system shown, $M=1kg$;$K1=K3=20\frac{N}{m}$;$K2=10\frac{N}{m}$;$K4=15\frac{N}{m}$;$B1=4N-\frac{s}{m}$;

$B2=3N-\frac{s}{m}$;$B3=5N-\frac{s}{m}$;$B4=1N-\frac{s}{m}$

$8$a$)$ Beq$=6$ Ns$/$m

$8$b$)$ MATLAB Coding: Using "ode$45",$ plot displacement $x$ and velocity v versus time graph for $0t10$

seconds when subjected to $f_a(t)=e^{-t}sin(t).$ Note: Initial Conditions $($I$.$C$.$