What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will climb a mountain. For all x_9, if x_9 climbs a mountain, then x_9 is writing a letter. For all x_9, if x_9 writes a letter, then x_9 is rich. For all x_9, if x_9 were rich, then x_9 is drinking water. There is at least one x_9 for which x_9 is an astronaut.
For all x_9, x_9 will write a letter. For all x_9, if x_9 climbs a mountain, then x_9 is rich. For all x_9, if x_9 writes a letter, then x_9 is drinking water. There is at least one x_9 for which x_9 is an astronaut and x_9 will climb a mountain. There is at least one x_9 for which x_9 will climb a mountain and x_9 is an astronaut.