Declare an interface called incrementable which represents items that store an integer that can be incremented in some way. the interface has a method called increment that increments the value and a method called getvalue that returns the value. once you have written the interface, write two classes called sequentialincrementer and randomincrementer that implement the interface. the sequentialincrementer begins its value at 0 and increases it by 1 each time it is incremented. the randomincrementer begins its value at a random integer and changes it to a new random integer each time it is incremented.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.