The 1.8 kg collar shown in Figure 7 is released from rest against the light elastic spring, which has a stiffness of 1750 N/m and has been compressed a distance of 150mm. The kinetic friction between the collar and the vertical shaft is a constant 0.15 Newtons while the collar is in motion. a) Draw a Free Body Diagram for the collar at the point of release [with the spring compressed at 150 mm and is stationary) b) Determine the acceleration of the collar as a function of the vertical displacement x of the collar measured in metres from the point of release, while the collar is still in contact with the spring c) Find the velocity of the collar when x = 0.15m. d) Determine how much higher the collar travels after it leaves contact with the spring(the spring stops at its fully relaxed position