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The number of members of 10 families in a gated community are 2, 4, 8, 13, 3, 4, 13, 9, 9, and 8.
 
Considering the data thus obtained, complete the blanks given below:
 
1. The smallest family size is , and the number of families of the smallest size is .
  
  
2. The largest family size is , and the number of families of the largest size is .
  
  
3. The average family size is .
 
[Note: Round off the answer to one decimal places.]