Atugboat pulls two barges down the river. the barge connected to the tugboat, carrying coal, has an inertia of 2x10^5 kg, and the other barge, carrrying pig iorn, has an inertia of 3x10^5 kg. the resistive force between the coal barge and the water is 8x10^3n, and the resistive force between the pig iorn barge and the water is 10x103n. the common acceleration of all three boats is .4 m/s^2. even though the ropes are huge, the gravitational foce exerted on them is much smaller than the pulling forces. a. what is the tension in the rope that connects the tugboat to the coal barge? b. what is the tension in the rope that connects the two barges? c. repeat parts a and b for the case in which the order of the barges is reversed.