Please help write the code for $8$b:

$8$a$)$ Beq$=6$ Ns$/$m Keq$=27$ N$/$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$.$