Consider the following premises. For all x_11, if x_11 were a writer, then x_11 is playing tennis. For all x_11, if x_11 were a bartender, then x_11 is happy. For all x_11, if x_11 plays squash, then x_11 is playing tennis. For all x_11, x_11 is a bartender. For all x_11, x_11 will play squash or x_11 is a writer. Can we infer the following from them? Sarah is not playing tennis.
That contradicts the premises. Therefore the answer is no.