<｜begin▁of▁sentence｜>### Instruction:
As a product demonstrator at a technology showcase event, you need to present a demonstration of a Python library called NetworkX, which is used for creating and analyzing complex networks and graphs. Your task is to showcase how to create a simple tree graph and initialize a Descartes coordinate system with specific bounding box and value bounds to plot the graph on a 600x600 pixel display. After the demonstration, you will need to save the plot to a file named 'tree_graph.png' to conclude your presentation.
### Response:
from igraph import Graph
from igraph.drawing import Plot
from igraph.drawing.cairo import CairoDrawer, DescartesCoordinateSystem

# Create a simple graph
g = Graph.Tree(5, 2)

# Create a plot with 600x600 pixels
plot = Plot(bbox=(600, 600))

# Initialize the drawer for the plot
drawer = CairoDrawer(plot.surface, bbox=plot.bbox)

# Initialize the Descartes coordinate system
descartes = DescartesCoordinateSystem(drawer.context, bbox=plot.bbox, bounds=(0, 0, 10, 10))

# Draw the graph using the Descartes coordinate system
drawer.draw(descartes, g)

# Save the plot to a file
plot.save('tree_graph.png')
<|EOT|>
