Translate the following inference to logic notation: For all x, x_12 will cook if and only if x_12 is an artist. If Robert were a musician, then Susan is a lawyer. If Susan were a lawyer, then James is an artist. Therefore if Robert were a musician, then James is cooking.
forall x: P(x) <-> Q(x). p -> q. q -> Q(a). Therefore p -> P(a).