Using propositional-formula and logical connectives, convert these sentences into symbolic form. No doctors are enthusiastic; You are enthusiastic. Therefore, you are not a doctor Dictionaries are useful; Useful books are valuable. Therefore, dictionaries are valuable. Some healthy people are fat; No unhealthy people are strong. Therefore, some fat people are not strong. All, who are anxious to learn, work hard; Some of these boys work hard. Therefore, some of these boys are anxious to learn. All lions are fierce; Some lions do not drink coffee. Therefore, some creatures that drink coffee are not fierce. No misers are generous; Some old men are ungenerous. Therefore, some old men are misers. All young lambs jump; No young animals are healthy, unless they jump. Therefore, all young lambs are healthy. No professors are ignorant. All ignorant people are vain. Therefore, no professors are vain. All bees are unfriendly; No butterflies are unfriendly. Therefore, butterflies are not bees. Expert's answer