37. A bijection is a map that is both one-one and onto. It is given that f:R->R is nota bijection. Which of the following must be true? (a.) If fis not one-one, thenfis not onto. (b.)Iffis not onto, thenfis not one-one. (c.)fis neither one-one nor onto. (d.) Iffis one-one, thenfis not onto.