Consider a community where people have between 0 and 7 pets.  Let `A` be the event of a person having at least 3 pets and `B` be the event of a person having at most 7 pets. Find each of the following sets. Enter your answer by listing the elements in increasing order, separated by commas. Do not put a comma after the last number. If the set is empty, enter DNE.

1.  `A ={`  `}` 
2.  `B ={`  `}` 
3.  `A \cap B ={`  `}` 

Box 1: Enter your answer as a list of integer or decimal numbers separated with commas: Examples: -4, 3, 2.5172
Enter DNE for Does Not Exist, oo for Infinity

Box 2: Enter your answer as a list of integer or decimal numbers separated with commas: Examples: -4, 3, 2.5172
Enter DNE for Does Not Exist, oo for Infinity

Box 3: Enter your answer as a list of integer or decimal numbers separated with commas: Examples: -4, 3, 2.5172
Enter DNE for Does Not Exist, oo for Infinity