(II) The carton shown in Fig. 4−55 lies on a plane tilted at an angle θ=22.0∘ to the horizontal, with μk=0.12 . (a) Determine the acceleration of the carton as it slides down the plane. (b) If the carton starts from rest 9.30 m up the plane from its base, what will be the carton's speed when it reaches the bottom of the incline?