Urgent help with physics question pleaseee

The electric potential is –1.2 *10&–4 J C–1 at a point 1.2*10^–5 m from an isolated electron. An α-particle 4 He, passes through this point.

What is the magnitude of the electric potential at the mid-point between the α-particle and the electron at this instant?

So I used v=((1.6*10^-19)*2)/(4pi*(8.85*10^-12)*(1.2*10^-5)) to calculate the electric potential - and then I added this to the electric potential given and divided by 2.. but this method is wrong - can anyone help please????

V=((1.6*10^-19)*2)/(4pi*(8.85*10^-12)*(1.2*10^-5))

You did not calculate the electric potential properly because you use the wrong distance.
You are asked potential at the mid point between the α-particle and the electron.

I also tried dividing that distance in red by two and calculating - still wrong??

Calculate the electric potential of both the electron to the mid-point and then the electric potential of the alpha particle to the mid-point. Then add them together, I think?

Now this was extremely helpful Thank you so much - so you just ignore the electric potential they give in the question

....... so you just ignore the electric potential they give in the question

Yeah, kinda... I think they gave it to you so you can work out the charge of the electron but that's already known!