Suppose set A = {green, blue, red, black, orange} and set B = {gray, purple, blue, orange, white}   (a) What is A∪B? (b) What is A∩B? (c) What is the cardinality of A, or in other words, what does | A | equal? (d) What is the cardinality of B, or in other words, what does | B | equal? 2. What is a set? What is a subset? How can we show that a set is equal to another set, using this relationship of subsets? Explain using an example.

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