please answer both questions

Write a lisp function that accepts a list as the input argument (the list is mixed up integers, decimals, characters and nested lists) and creates a list including all the characters in the original list without any duplication. Sample program output is shown below: 1. (z f) (b a 5 3.5) 6 (7) (a) c) > (zfb a c) 2. ((n) 2 (6 h 7.8) (w f) (n) (c)n)-> (h wfcn) uestion Write a Lisp function f-1-swap that swaps the first and last elements of a list. Sample Output: (f-I-swap ((a d) f 10 w h))(h f 10 w (a d) (f-I-swap '(g 6 p 10 m))(m 6 p 10 g) Write a lisp function that accepts a list as the input argument (the list is mixed up integers, decimals, characters and nested lists) and creates a list including all the characters in the original list without any duplication. Sample program output is shown below: 1. (z f) (b a 5 3.5) 6 (7) (a) c) > (zfb a c) 2. ((n) 2 (6 h 7.8) (w f) (n) (c)n)-> (h wfcn) uestion Write a Lisp function f-1-swap that swaps the first and last elements of a list. Sample Output: (f-I-swap ((a d) f 10 w h))(h f 10 w (a d) (f-I-swap '(g 6 p 10 m))(m 6 p 10 g)