The gear A on the drive shaft of the outboard motor has a radius rA = 12.5 mm and the meshed pinion gear B on the propeller shaft has a radius rB = 30 mm. The propeller is originally at rest and the motor frame does not move. If the drive shaft rotates with an angular acceleration a = (400t 3 ) rad/s2 , where t is in seconds. determine the magnitude of the velocity and acceleration of point P located on the tip of the propeller at the instant t = 0.75 s