Superposition Question, electric circuits

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Homework Statement

^^^^ = resistor = 10 ohm
<> = 3*Vab Dependent voltage. (the voltage equals 3 times Vab)
0 = voltage source 4 v (inderpendant)
o = Inderpendant Current source 2 A



|--^^^^---<>---------a +
| + + - |
0 o Vab
| - |
|-----------------------b -

Question asks, Find Vab (the voltage across a and b) using superposition

Homework Equations

Well there's lots, ohms, KCL, KVL etc,

The Attempt at a Solution

I want to attempt it, but i don't no how to break this down, as all the examples in the txt book don't have the dependent votlage source, and in the examples they are solving for a voltage across a resistor.

Any ideas? thanks
ps i also uploaded the image just incase the one above didnt work once posted

 

[CEL]

What is the current through the 10 ohm resistor?
What are the voltages at the two ends of this resistor?