What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_14, x_14 will write a letter if and only if x_14 is rich. If James were fast, then Mary is rich. Mary is not writing a letter. For all x_7, x_7 is fast if and only if x_7 will cook.
For all x_14, if x_14 writes a letter, then x_14 is rich. For all x_7, if x_7 were fast, then x_7 is cooking. For all x_14, if x_14 were rich, then x_14 is writing a letter. For all x_7, if x_7 cooks, then x_7 is fast.