\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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.