The bar AB of the mechanism in Figure 1 is rotating with an angular velocity of 2 rad/s and with an angular acceleration of 4 rad/s2 in the counterclockwise direction with respect to a perpendicular axis passing through the fixed point A. (2.0 pts) Calculate: (a) The position of the instantaneous center of rotation (0.25 pts). b) The angular acceleration of the bar BC (0.75 pts) c) The acceleration vector at point C of the bar BC (1.0pt) 100 mm C D 60 450 mm WAB a AB = 2 rad/s = 4 rad/s B 200 mm