Rod OA (length is L = 0.2 m) can rotate about O and can slide on the smooth surface of the wedge C, wedge C can move on the horizontal surface. See the picture below. If wedge C moves to the left with a constant velocity V = 3 m/s, given ϕ= 45 degree (this is a constant), Use a absolute motion analysis (use the coordinate x in the picture) to determine:

a. Angular Velocity of OA rod omega_OA when θ = 30 degree.

b. Angular Acceleration of OA rod alpha_OA when θ = 30 degree