Look at the picture below. A spring with a spring constant of k is connected to an object of mass m. The spring is pulled to the left with a force of f(t), so that the object's position changes every time. Suppose that the object's position with respect to the equilibrium point at time t is expressed as a MAMA MAMA function of x(t), so that the movement of this mass spring system can be expressed by the following differential equation mx" + kx = f(t) M, k M f (t ) oooooo If m = 1, k =9, f(t) = sin 2t, x(0) = 1, dan x'(0) = 0, please find solution x(t)