K4 Calculate the displacement, velocity and acceleration of a particle, using cylindrical coordinate system \text { vectorial equation in cylindrical coordinates: } r(\theta)=G u_{r}+3 G \cos \theta u_{z} Determine:

a) The vectorial equation describing the velocity v(0) \text { b) The magnitude of the velocity for } \theta=30^{\circ}, v\left(\theta=30^{\circ}\right) \text { c) The vectorial equation describing the acceleration } a(\theta)