Convert the following expressions from reverse Polish notation to infix notation. a) 12 8 3 1 + – / b) 5 2 + 2 × 1 + 2 × c) 3 5 7 + 2 1 – × 1 + + Convert the following expressions from reverse Polish notation to infix notation. a) W X Y Z – + × b) U V W X Y Z + × + × + c) X Y Z + V W – × Z + +