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 500 N of tension. Ellen’s rope pulls toward the right, 25° 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 main cable supporting the piano?