Urgent Please answer fast. It don't need to explain just need answer. Thank you so much.

4) The function f : {0,1}? {0,1}is defined as: For every ve {0,1), f(x) = 0x. Select the set corresponding to the range of f. a. {000.001.010.011) b. {01,00 c. 2000, 001,010,011, 100, 101, 110, 111) d. 200,01, 10.11 6) F:0,14 0,14. f(x) is obtained from x by replacing the last bit with 1. For example, f(1000) = 1001. Select the correct description of the function f. a. One-to-one and onto b. One-to-one but not onto c. Neither one-to-one nor onto d. Onto but not one-to-one