<｜begin▁of▁sentence｜>### Instruction:
Given an existing layout of an igraph graph, how do you determine the bounding box of the layout, adjusting the bounds by a border of 5 units?
### Response:
import igraph as ig

# Assuming 'layout' is an existing layout of an igraph graph
bounding_box = layout.bounding_box(border=5)

# Extract lower left and upper right corners of the bounding box
lower_left = (bounding_box.left, bounding_box.top)
upper_right = (bounding_box.right, bounding_box.bottom)

print('Lower left corner:', lower_left)
print('Upper right corner:', upper_right)
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