A phone company with 220,000 customers provides 50,000 with call waiting, 100,000 with call forwarding, and 20,000 with both. a). Draw a Venn diagram b). How many customers receive at least one phone service? c). How many customers receive exactly one kind of phone service? d). How many customers receive only call forwarding? e). How many customers do not receive either of these phone services?

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