In the following circuit, find Vo, V1, V2, V3, Io, I1, and I2

Hey there, just working on a physics assignment and there is a picture of a circuit and it wants me to find Vo, V1, V2, V3, Io, I1, and I2. Here is a picture of the circuit: http://oi43.tinypic.com/351e72a.jpg

R1= 60 Ohm's
R2= 60 Ohm's
R3= 30 Ohm's
I3= 6 A

How do I go about to figuring out the voltages, etc? Thanks in advance.

potential drop across r3=i3*r3=6*30=180V

Now from the circuit R1, R2, R3 and the battery are in parallel so Potential drop across are same.
so v0=v1=v2=v3=180V

Now we have Potential drop across each register so we can calculate the Current=V/r
i2=180/60=3 amp
i1=180/60=3 amp
i0=i1+i2+i3=3+3+6=12amp