A narrowing ladder 3.0 m long weighing 200 N has its center of gravity 120 cm from the bottom. At its top end is a 50-N can of paint. Compute the work required to raise the ladder from being horizontal, lying on the ground, to being vertical with its legs resting on the ground. In other words, how much work must be done to rotate the ladder into an upright vertical position, thereby raising both its center of gravity and the can of paint?