please answer with explaination i could not understand other peoples answers

13.313.4 (12.3/12.4) For each of the descriptions below, construct an FSA and a regular expression. Assume the alphabet is {0,1) a) All strings that start with O and end with I. b) All strings that have an odd length. c) All strings that contain exactly one 1. d) All strings that do not contain exactly one 1. 13.313.4 (12.3/12.4) For each of the descriptions below, construct an FSA and a regular expression. Assume the alphabet is {0,1) a) All strings that start with O and end with I. b) All strings that have an odd length. c) All strings that contain exactly one 1. d) All strings that do not contain exactly one 1