What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Mary is happy. For all x_2, x_2 will play squash. For all x_2, x_2 is a mechanic.
There is at least one x for which x is happy. For all x_2, x_2 will play squash and x_2 is a mechanic. For all x_2, x_2 is a mechanic and x_2 will play squash.