e is a form of deductive reasoning where you arrive at a specific conclusion by examining two other premises or ideas.

All of the employees at the acmesoft company are either programmers or salespeople. The programmers are always tell the truth, the salespeople always lie. Threes Acmesoft employees - A, B, and C-were standing together in the hallway. A visitor passed by and asked A. "Are you a programmer or a salesperson?" A mumbled an answer that the visitor could not hear clearly. The visitor then asked B, "what did A say?" B replied. "A said that he is a salesperson."At this point, the third employee, C, said ,"Don't believe B; he is lying! What are B and C? 1/ B and C are both programmers 2/ B is a programmer and C is a salesperson 3/  B is a salesperson and C is a programmer 4/ B and C are both salesperson

Exercise 6. Let x,y E R. Consider the following statement statement: If y² < x² + y, then y ≤ x. (a) Give the contrapositive of the statement form given above. (b) Negate the statement given above. (c) Find one pair of values (x, y) such that the negation of the statement is true. Justify that the values given make the negation true.

what is an example of an invalid argument and why it is invalid?