What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 will sleep or x_7 is a musician. For all x_7, if x_7 were a musician, then x_7 is fast. For all x_7, x_7 will sleep if and only if x_7 is fast. For all x_7, if x_7 were fast, then x_7 is an office clerk.
For all x_7, if x_7 were a musician, then x_7 is an office clerk. For all x_7, if x_7 sleeps, then x_7 is fast. For all x_7, if x_7 were fast, then x_7 is sleeping.