Question 1129421
.
It was solved and carefully explained under this link


<A HREF=https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1129419.html>https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1129419.html</A>


https://www.algebra.com/algebra/homework/sets-and-operations/sets-and-operations.faq.question.1129419.html