Question $8(1$ point$)$

An electron has a speed of $4\mathrm{.}5{10}^6\frac{m}{s}$ due east, experiencing a magnetic force that has a maximum magnitude of $8\mathrm{.}0{10}^{-14}N$ and a direction of due south. What are the magnitude and direction of the magnetic field causing the force?

a$.0\mathrm{.}2$ T pointing up

b$.0\mathrm{.}1$ T pointing down

c$.0\mathrm{.}1$ T pointing up

d$.0\mathrm{.}2$ T pointing down

e$.0\mathrm{.}4$ T pointing down