A 500 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, 15 ∘ below horizontal, with 380 N of tension. Ellen's rope pulls toward the right, 30 ∘ below horizontal.
A: What tension must Ellen maintain in her rope to keep the piano descending at a steady speed?
B: What is the tension in the vertical main cable supporting the piano?
