Answer
$$V={-2.68\times10^-14}{V}$$
Work Step by Step
By using formula
$$\Delta{V}={-∫{E}\times\Delta{dx}}-i$$
The limit of integration is from 0 to r
Using electric field
as 1.45 is less than 2.31 which is radius of sphere which means point lies inside the sphere so we use field formula .
$${E}=({k}\times{q}\times{r)}\div{R^3}$$
by substituting in i and putting small r equals to $${1.45}$$
the $${V}={-2.68}\times{10^-4V}$$
