*For numbers 11-15, use the following sets:
U= {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
A= {0, 1, 2, 3,4}
B= {3, 5, 8}
C= {0, 2, 6, 8}
11. What are the elements present in (A u B)'n C?
a. {9}
c. {7}
b. {8}
d. {6}
12. How many elements are present in set A?
c. 3
b.4
d.2
13. What are the elements present in (An C)?
a. {1, 3, 4, 5, 6, 7, 8, 9}
c. {1, 3, 4, 5, 6, 7, 8}
b. {1, 3, 4, 5, 8, 9}
d. {1, 2, 3, 4, 5, 6}​