Before building a model, an analyst checks which feature varies the most. Each row of X is a customer and each column a feature (illustrative numbers).
Store the position of the column with the largest standard deviation.
Expected answer
Store your answer in result.
Hints, the later steps and the answer come with Pro.
import numpy as np
X = np.array([
[3.0, 120.0, 0.5, 40.0],
[4.0, 80.0, 0.7, 42.0],
[2.5, 300.0, 0.4, 39.0],
[3.5, 95.0, 0.6, 41.0],
[5.0, 210.0, 0.9, 40.5],
])
result = ...