The mass m, stiffness k, and natural frequency fn of an undamped SDF system are unknown. These properties are to be determined by harmonic excitation tests. at an excitation frequency of 4 Hz, the response tends to increase without bound. Next, a weight delta w=5lbs is attached to the m and the resonance test is repeated. This time resonance occurs at f=3 Hz. Determine the mass and stiffness of the system