Engineering ANOTHER simple circuit analysis question

[ABoul]

Homework Statement

the question can be found here: http://www.mailfreeonline.com/uploader/5731C3EE.jpg

Homework Equations

The Attempt at a Solution

i couldn't do parts a and b.

part c:
i added resistors in parallel and somehow got a value that Vo = 9.33V (part of the circuit above the 2A current source simplifies to a current sources of 5A and the lower part to a resistor of 4/3). surely i should only be able to find Vo in terms of Io...

could someone please show me how to do part (a) and confirm my answer for part (c)?

 

[misgfool]

Homework Statement

the question can be found here: http://www.mailfreeonline.com/uploader/5731C3EE.jpg

Homework Equations

The Attempt at a Solution

i couldn't do parts a and b.

part c:
i added resistors in parallel and somehow got a value that Vo = 9.33V (part of the circuit above the 2A current source simplifies to a current sources of 5A and the lower part to a resistor of 4/3). surely i should only be able to find Vo in terms of Io...

could someone please show me how to do part (a) and confirm my answer for part (c)?

So what's the bottleneck in a)?

 

[noumed]

looks like the only way to confirm the answer for (c) is to do part (a) and (b) first. =]

like what misgfool said, what's the bottleneck in (a)? try drawing the currents across the resistors, and do KCL like before.