State Kirchhoff's laws for electrical circuit with the sign conventions.

Explanation

### Step-by-Step Solution:

**Step 1: State Kirchhoff's Current Law (KCL)**
Kirchhoff's Current Law states that the total current entering a junction (or node) in an electrical circuit is equal to the total current leaving that junction. Mathematically, this can be expressed as:
\[ \sum I_{\text{in}} = \sum I_{\text{out}} \]
In terms of sign conventions, currents entering the junction are considered positive, while currents leaving the junction are considered negative. Therefore, we can write:
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