At time t1, an electron is sent along the positive direction of an U axis, through both an electric field _ and a magnetic field B with _ directed parallel to the y axis. The figure gives the y component Inety of the net force on the electron due to the two fields, as a function of the electron's speed U at time t]. The scale of the velocity axis is set by Us = 1.2 m/s. The X and Z components of the net force are zero at 1. Assuming Ba = 0 find the magnitude of B in units of Tesla. Fivety (10 9 N) 0 0 -1 -2 v (m/s)