physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 82.6 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 47.2 N, and T3 = 9.5 N. What are the masses of (a) disk A, (b) disk B, (c) disk C, and (d) disk D?

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