Three monkeys A, B, and C weighing 20, 25, and 15 lb, respectively, are climbing up and...

Three monkeys A, B, and C weighing 20, 25, and 15 lb, respectively, are climbing up and down the rope suspended from D. At the instant represented, A is descending the rope with an acceleration of 5 ft/sec², and C is pulling himself up with an acceleration of 3 ft/sec². Monkey B is climbing up with a constant speed of 2 ft/sec. Treat the rope and monkeys as a complete system and calculate the tension T in the rope at D.