please help with question 4 and question 5 (choose the correct answer only)

If set A={1,2,3), B={2,4,6,8}. What is AnB Select one: O a. (2} O b. {2,4, 6,8} O c. {1,2,3} O d. {2,3} Question 5 Not yet answered Marked out of 1.00 Flag question If set A={1,3,5,7,9), B={2,4,6,8}. What is AUB Select one: O a. {1,2,3,4,5,6, 7,9} O b. {1, 3, 5, 7,9} O c. {2,4,6,8} O d. {1,2,3,4,5,6, 7,8,9}