Four 3-kg packages are held in place by friction on a conveyor which is disengaged from its drive motor. When the system is released from rest, package 1 leaves the belt at A just as package 4 comes onto the inclined portion of the belt at B. Determine

(a) The velocity of package 2 as it leaves the belt at A,

(b) The velocity of package 3 as it leaves the belt at A. Neglect the mass of the belt and rollers.