What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, if x_8 were a bartender, then x_8 is happy. For all x_8, if x_8 were a cashier, then x_8 is a bartender. For all x_8, x_8 is not a cashier. For all x_8, x_8 will play tennis or x_8 is a bartender. For all x_8, x_8 will not play tennis or x_8 will make tea. For all x_8, if x_8 were happy, then x_8 is a cashier.
For all x_8, x_8 is not happy. For all x_8, if x_8 were a bartender, then x_8 is a cashier. For all x_8, if x_8 were a cashier, then x_8 is happy. For all x_8, if x_8 were happy, then x_8 is a bartender. For all x_8, x_8 is a bartender or x_8 will make tea.