Question 173100
I'll do the first two to get you started



A)



To find A U B, simply combine the sets A and B to get 


A U B = { 2, 3, 7, 9, 10}



Now to find the complement of A U B, just form a new set of elements that are in U, but NOT in A U B



So 



(A U B)' = {1,4,5,6,8}




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B)


To find A intersect C, just look for the elements that are in A AND in C



Since the element 10 is in both sets A and C, this means that



A intersect C = {10}