The figure shows electrons 1 and 2 on an
xaxis and charged ions 3 and 4 of identical charge -9 and at identical angles
\theta . Electron 2 is free to move; the other three particles are fixed in place and are intended to hold electron 2 in place. For physically possible values of
q<=5e, what are the (a) smallest, (b) second smallest, and (c) third smallest values of
\theta for which electron 2 is held in place?