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 poor, then x_10 is a musician. For all x_10, if x_10 were happy, then x_10 is a cashier. For all x_10, if x_10 were happy, then x_10 is a soldier. For all x_10, if x_10 were a soldier, then x_10 is poor. For all x_10, if x_10 were a cashier, then x_10 is happy.
For all x_10, if x_10 were happy, then x_10 is poor. For all x_10, if x_10 were a soldier, then x_10 is a musician. For all x_10, if x_10 were a cashier, then x_10 is a soldier. For all x_10, x_10 is happy if and only if x_10 is a cashier. For all x_10, x_10 is a cashier if and only if x_10 is happy.