<｜begin▁of▁sentence｜>### Instruction:
As a Meteorological Technician, part of my responsibility involves collecting and recording various meteorological data to support weather analysis and forecasting efforts. Today, I've been tasked with analyzing a set of atmospheric pressure readings taken at different locations. 

Here's the  [15, 20, 40, 35, 50]. 

To enhance our analysis, I need to determine the 40th percentile of these pressure readings. I plan to utilize the 'quantile' function available in the Python library igraph to calculate this percentile. Once calculated, I'll round the result to two decimal places for clarity. This will provide valuable insights into the distribution of pressure levels across the observed locations, aiding our understanding of atmospheric conditions.
### Response:
import igraph as ig

# A vector of numeric values
data = [15, 20, 40, 35, 50]

# Calculate the 40th percentile
result = ig.statistics.quantile(data, 0.4)

# Round the result to two decimal places
rounded_result = round(result, 2)

print('The 40th percentile is:', rounded_result)
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