Current Attempt in Progress

The figure shows four identical conducting spheres that are actually well separated from one another. Sphere $W($with an initial charge of zero$)$ is touched to sphere A and then they are separated. Next, sphere $W$ is touched to sphere $B($with an initial charge of $-26e)$ and then they are separated. Finally, sphere $W$ is touched to sphere $C($with an initial charge of $46$e$),$ and then they are separated. The final charge on sphere $W$ is $14e.$ What multiple of $e$ gives the initial charge on sphere $A?$

$A,B,C$

W

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