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2. A robot (8000 kg) is flying in the air on Earth is subjected to the following forces acting at various locations relative to its center of mass. (The image is purely for illustration purposes.) Description Force (N) Location of force from the center of mass (m) Weight -8000 (9.81) k At the center of mass Backpack +70000k -0.80j - 4.5k Left leg -3501 + 5000k -4.0j - 10.0k Right leg -4001 - 3001 + 5000k +2.51 + 4.0j - 9.0k a. What is the net force on the robot? b. What is the net torque on the robot about its center of mass