Three astronauts, propelled by jet backpacks, push and guide a 121 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 35 N, F2 = 55 N, F3 = 38 N, θ1 = 30∘, and θ3 = 60∘. What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis in the range of (−180∘, 180∘]) of the asteroid's acceleration? (a) Number Units (b) Number Units