let A= {1,2,3,4,5,6}. In each case give an example of a function f: A->A with the indicated properties, or explain...

let A= {1,2,3,4,5,6}. In each case give an example of a function f: A->A with the indicated properties, or explain why no such function exists. a. f is bijective, but not 1_A b. f is neither one-to-one nor onto c. f is one-to-one, but not onto d. f is onto, but not one-to-one