What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 were a janitor, then x_5 is writing a letter. For all x_5, if x_5 drinks water, then x_5 is a janitor. There is at least one x_5 for which if x_5 were a mechanic, then x_5 is making tea. For all x_5, if x_5 makes tea, then x_5 is drinking water.
For all x_5, if x_5 drinks water, then x_5 is writing a letter. For all x_5, if x_5 makes tea, then x_5 is a janitor. There is at least one x_5 for which if x_5 were a mechanic, then x_5 is drinking water.