2. Let 2 10,13. For each part below, write the regular expression that describes the set. 20 points a) L,-{wl w starts with 0 and is of odd length or ends with 1 and length is a multiple of three} b) L2 w is any string except 00, 11, 100, and 101 c) L3- (xy|x is an odd number of 1s and y is an even number of Os and xy 23) d) Lw is any string except the empty string