a) Let A ="Aldo is Italian" and B ="Bob is English". Formalize the following sentences: (i) "Aldo isn't Italian" [1 mark] (ii) "Aldo is Italian while Bob is English" [1 mark] (iii) "If Aldo is Italian then Bob is not English" [1 mark] (iv) "Aldo is Italian or if Aldo isn't Italian then Bob is English" [2 marks] (v) "Either Aldo is Italian and Bob is English, or neither Aldo is Italian nor is Bob English