Density heights and bin areas

The code splits the hours that 8 students spent playing games in a day into bins 2 hours wide and computes the density. Predict the three lines of output without running the code.

Code

import numpy as np

hours = [3, 1, 2, 6, 3, 2, 4, 3]
edges = [0, 2, 4, 6, 8]

density, _ = np.histogram(hours, bins=edges, density=True)
print(density.tolist())
print(float(density[1] * 2))
print(float((density * 2).sum()))