Acted on by the two Torques A particle is acted on two torques about the origin: t1 consists of a magnitude of 4.0 N•m and is directed in the positive direction of the x-axis, and t2 consists of a magnitude of 1.4 N•m and is directed in the negative direction of the y-axis. Determine the magnitude and direction of d/dt, where is the rotational momentum of the particle about the origin?