A uniform meter stick weighing 30 N has a 40 N weigth on its left end and a 40 N

A uniform meter stick weighing 30 N has a 40 N weigth on its left end and a 40 N weight on its right end. The bar is hung from a rope. What is the tension in the rope and how far from the left end of the bar should the rope be attached so that the stick remains level? 
110. N placed 30.0 cm from the left end of the bar
220. N placed 50.0 cm from the left end of the bar
330. N placed 50.0 cm from the left end of the bar
110. N placed 50.0 cm from the left end of the bar

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