Question

answer all questions step by step but mostly Q5 and 9 must plz​

Answer 1

5 ) always A because there are symbol of empty set means no any member in set.
so combination of A U enpty set is always A
A U empty set =(0,2,4,6,8)U ( )
=(0,2,4,6,8)

9) always empty set
bcause common member is zero for empty set.

Answer 2

AUC= {0,1,2,3,4,6,8}