An electron sits inside and just above the center of the floor (z=0) of an electrically neutral box aligned with the base vectors of a Cartesian coordinate system (x, y, z). The box itself sits inside of a large solenoid, driven by an AC power source, capable of generating a highly collimated magnetic field. At t=0, the electron has an 'upward' velocity aligned with the Z-axis, and the collimated magnetic field is entirely aligned with the y-axis. If strength of the magnetic field at t=0 is at a maximum, which of the 6 sides of the box might the electron collide with depending on the magnitude of undefined variables? (Mass, velocity, etc)