Express each of these sets using a regular expression a. The set of strings with less than 4 bits. b. The set of strings where every 0 is followed by another 0, then two 1ls. c. The set of strings...

i think b is ( 00*1) , but the rest I'm not sure

Extracted text: Express each of these sets using a regular expression a. The set of strings with less than 4 bits. b. The set of strings where every 0 is followed by another 0, then two 1ls. c. The set of strings with exactly seven 1s, with no consecutive 1s. d. The set of strings ending in 00 and not containing 11.