That is, in the preceding Venn diagram, the yellow-coloured part displays the Union of sets A and B. A={1,3,6,8}B={2,3,4,5}C={5,8,9}Find the cosmopolitan set for all the 3 sets A, B and C. But the Union of sets is an business activity performed on two sets, say A and B, which results in a set that has …