Finding EMF using Kirchhoff's rules?

What is the emf, E, of the battery in the circuit of the figure below?

Figure: https://spock.physast.uga.edu/res/brookscole/serway/College_Physics_7ed/Chap18/graphics/serw1818.gif

Assume that R1 = 1.10 ohm, R2 = 3.10 ohm, R3 = 5.00 ohm, R4 = 1.40 ohm, R5 = 11.0 ohm, V = 6.00 V and I = 1.80 A.

I don't know why I am having soo much trouble with this. I have combined resistors 1 and 2 in series and 3 and 4 in series and applied the loop rule and I am still getting an incorrect answer... any suggestions?

oldschool2013-07-15T16:29:19Z

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