Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: In the rectangle below, line segment $MN$ separates the rectangle into $2$ sections. What is the largest number of sections into which the rectangle can be separated when $4$ line segments (including $MN$) are drawn through the rectangle? [asy]
size(3cm,3cm);
pair A,B,C,D,M,N;
A=(0,0);
B=(1.5,0);
C=(1.5,1);
D=(0,1);
draw (A--B--C--D--A);
M=(0.8,0);
N=(1.2,1);
draw(M--N);
label("M",M,S);
label("N",N,NNE);
[/asy]
user