Consider an elastic pendulum shown in the below figure. The motion of the system is described by the following two second-order differential equations: L = LO² + g cos g ㅂ = -250-은 -2--0---sin 0 (L-Lo) m where Lo is the unstretched length of the pendulum. Assume g = 9.81 m/s², m = 5 kg, Lo = 1 m, k = 1000 N/m. Write a computer program to numerically solve the system using the methods 2) second-order Runge-Kutta