Given:
We're the data and range of age of members for various teams.
To find:
(A) Based on the information, We need to find which team has the oldest members on average.
(B) Based on the information, We need to find which team's ages have the least variability.
Step-by-step solution:
(A)
As per the given information, Team D has the highest mean age of 31.
Thus Team D has the oldest members on average.
(B)
The least variability means less value of the range, thus we can say that Team B has the least range of ages of 16.
Thus Team B has the least variability.