\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
The following data shows the weights (in kg) of 10 packages stored in a warehouse: $$4.2,\ 3.8,\ 5.5,\ 6.1,\ 4.9,\ 3.6,\ 4.4,\ 5.2,\ 6.7,\ 3.9$$Find the range of the weights.