6.8.39 Set theory

Condition: Let the universal set \(U-\) be the set of all employees of a certain company. A is the set of all employees of this organization over 35 years of age; B - many employees with more than 10 years of work experience; C is the set of managers of the company. What is the meaningful meaning (characteristic property) of the following set: 1\( ) A \cup(B \cap \bar{C}) \); 2) \( A \cap B \cap C \);3) \( B \backslash C \).