What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, if x_10 were sad, then x_10 is a musician. There is at least one x_10 for which x_10 will take a plane if and only if x_10 will make tea. For all x_10, if x_10 takes a plane, then x_10 is sad.
For all x_10, if x_10 takes a plane, then x_10 is a musician. There is at least one x_10 for which if x_10 takes a plane, then x_10 is making tea. There is at least one x_10 for which if x_10 makes tea, then x_10 is taking a plane.