Given a string S, write expressions to print

Q. Given a string S, write expressions to print

(i) First five characters of S

(ii) Ninth character of S

(iii) Reversed S

(iv) Alternate characters from reversed S

Answer =

(i) S [ : 6]
(ii) S [ 9 : 10]
(iii) S [-1 : : -1]
(iv) S [len(S) : : -1 ]