$4-$ An electron is moving as shown. At the locations marked $\backslash$times ox $(-5\mathrm{.}0\backslash$times $10^(-3),0,0)$m and moving with a velocity

$(7\mathrm{.}3\backslash$times $10^(4),0,0)($m$)/($s$).$

$($i$)$ What is the magnetic field at the location C at $(0,2\mathrm{.}9\backslash$times $10^(-3),0)$m due to the electron? Show all steps in

your work. Your final answer must be expressed as a $3-$component vector

$($ii$)$ What is the magnetic field at the origin, h$0,0,0$i m$,$ due to the electron? Your final answer must be

expressed as a $3-$component vector.