Question # 2 a) Describe constructive interference of two waves. [2 marks] b) If a spring stretches from 12 cm to 16 cm when a mass of 2.4 kg is suspended from it, calculate the spring constant. [3 marks] c) A car of mass 1000 kg had its springs compressed vertically by 2.6 cm when a driver of mass 62 kg climbed into it. If damping is ignored what is the frequency of vibration when the car hits a bump while driving? [5 marks]