The payload rating (PR) of a truck is the truck's recommended load weight, which is specified as a number of tonnes (t), where 1 tonne = 1,000 kilograms. A certain truck's PR is a whole number of tonnes. The truck has hauled exactly 7 loads, exactly 3 of which had a greater weight than the truck's PR. The weights of these 7 loads, in tonnes, are as follows:
50, 51, 52, 52, 54, 54, 56.
Selected the Least and Greatest possible values for the truck's PR, in tonnes. Make only two selections, one in each column.