Amachine carries a 4.0 kg package from an initial position of di = (0.50 m) + (0.75 m) + (0.20 m) at t = 0 to a final position of df = (7.20 m) + (13.0 m) + (7.30 m) at t = 11 s. the constant force applied by the machine on the package is f = (2.00 n) + (4.00 n) + (6.00 n) . (a) for that displacement, find the work done on the package by the machine's force. j (b) also, find the power of the machine's force on the package. w