State Kirchhoff's laws in electricity.

Explanation

**Step-by-Step Solution:**

**Step 1: State Kirchhoff's First Law (Junction Law)**
Kirchhoff's First Law, also known as the Junction Law or Current Law, states that the algebraic sum of currents entering a junction must equal the algebraic sum of currents leaving the junction. Mathematically, this can be expressed as:
\[ I_{in} = I_{out} \]
or in terms of algebraic sum:
\[ \sum I = 0 \]
This means that if \( I_1 \) and \( I_2 \) are currents entering a junction and \( I_3 \) is the current leaving, then:
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