Kirchhoff's voltage law:

$\overline{){\mathbf{\Sigma}}{\mathbf{V}}{\mathbf{=}}{\mathbf{0}}}$

From Ohm's law:

$\overline{){\mathbf{V}}{\mathbf{=}}{\mathbf{I}}{\mathbf{R}}}$, where I is current and R is resistance.

Let's label the different regions in the diagram as shown below:

**Part A:**

Consider loop 1 in a clockwise direction:

9 - 6I_{1} - 12I_{3} = 0

**Part A**

How much current flows through the bottom wire in the figure(Figure 1) ?

Express your answer to two significant figures and include the appropriate units.

**Part B**

In which direction current flows through the bottom wire in the figure?

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