Net Electric Flux: Homework Part A, Part B

[DMDil]

Homework Statement

This is the question.
Charges q₁= -6Q and q₂ = +2Q are located at x =-a and x = +a, respectively.

Homework Equations

Part A
What is the net electric flux through a sphere of radius 2a centered at the origin?
Part B
What is the net electric flux through a sphere of radius 2a centered at x=2a?

NEED help with part B

The Attempt at a Solution

For part A
i did $$\Phi$$ = (-6Q+2Q)/E ; so = -4Q/E

 

[gabbagabbahey]

Draw a 2D sketch of the sphere in part B...which charge(s) does it enclose?

 

[DMDil]

i have got the answer
thanks anyway,, for part B
i got +2Q/E₀