What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x_10 for which x_10 will take a plane if and only if x_10 will go running. For all x_10, if x_10 makes tea, then x_10 is running. For all x_10, if x_10 were a musician, then x_10 is making tea. For all x_10, if x_10 takes a plane, then x_10 is a musician.
For all x_10, if x_10 were a musician, then x_10 is running can be inferred via the universal transitivity rule. For all x_10, if x_10 takes a plane, then x_10 is making tea can be inferred via the universal transitivity rule. There is at least one x_10 for which if x_10 takes a plane, then x_10 is running can be inferred via the existential biconditional elimination rule. There is at least one x_10 for which if x_10 goes running, then x_10 is taking a plane can be inferred via the existential biconditional elimination rule.