$($B$)$ Find the electric potential from each charge at B$.$

$V_{Q1}=-559\mathrm{.}06V$

$V_{Q2}=2061\mathrm{.}5V$

$V_{Q3}=1547\mathrm{.}9V$

Find the total electric potential at B

$V_B=3050\mathrm{.}34V$

$($C$)$ If a proton is released from rest at point ${?}^{***}B,$ how fast is it moving when it is very far away from the three charges?

$v_C=$

$($D$)$ How fast would the proton need to be moving very far away from the three charges to reach $*$B with a speed of $9\mathrm{.}17{10}^{5}m)$ss$?$

$v_D=$

$$

$($E$)$ If an electron is released from rest very far away from the three charges shown, how fast would it be moving at $*$B$?$

$v_E=$

$($F$)$ How fast must an electron be moving at $*B$ to come to rest very far away from the three charges?

$v_F=$