Physics Basic Force/Tension Problem?

Physics Basic Force/Tension Problem?The figure shows two 1.0 kg blocks connected by a rope. A second rope hangs beneath the lower block. Both ropes have a mass of 250 g. The entire assembly is accelerated upward at 3.0 m/s^2 by force Fhttp://session.masteringphysics.com/problemAsset/1073552/3/knight_Figure_08_26.jpgWhat is F?What is the tension at the top end of rope 1?What is the tension at the bottom end of rope 1?What is the tension at the top end of rope 2?How would I go about solving this? Thank you