The masses, measured in kilograms, of the 15 rugby players in teams $A$ and $B$ are shown below.
(i)[4]
Display the data with a back-to-back stem-and-leaf diagram, putting team $A$ on the left-hand side of the diagram and team $B$ on the right-hand side.
(ii)[2]
Calculate the interquartile range of the weights of the players in team $A$.
(iii)[3]
A new player joins team $B$ as a substitute. The mean weight of the 16 players in team $B$ is now $93.9\ \text{kg}$. Find the player's weight.
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