Two spheres are located $0\mathrm{.}50$ m from one another. Sphere A with a charge of

$-2\mathrm{.}7$ X $10*$C$,$ is fixed in position, but sphere B with a charge of $-5\mathrm{.}6$ X $10-5$ C is free to move. Spheres A and B each have a mass of $1\mathrm{.}3$ X $10-2$ kg$.$ a$.)$

b$.$

What is the electric potential at B

How fast is sphere B moving when it reaches a distance of $0\mathrm{.}95$ m from sphere A$?($Assume all distances are centre$-$to$-$centre.$)$