### 2.1: Graphs

### 2.1.1: Graph Definition

Study the definition of a graph from this section and draw some examples of your own.

### 2.1.2: Binary Tree

Make sure you know how a binary tree differs from a regular tree after the reading this section.

### 2.1.3: Example Problem: Minimum Spanning Tree

Read about minimum spanning trees and try to figure out how Prim's algorithm works; the solution can be found here. Before you check the solution, try to solve problem yourself. After you have solved the problem (or if you have spent a couple of hours working on it, and are stumped!), study the solution.