**P. 3866.** Two small bodies of masses *m*_{1}, and *m*_{2} are attached to the two ends of an ideal spring of spring constant *D*. The spring is stretched by *l*, and then the two bodies are released at the same time. Find the greatest speeds of the two masses, the amplitudes of their oscillations, and the frequencies. Friction is negligible. (*Data:* *m*_{1}=1 kg, *m*_{2}=2 kg, *D*=100 N/m, *l*=9 cm.)

(4 points)