1. (25 points) Please design regular expressions for the following languages (a) r over 0, 1) | r starts with 0 and has an odd number of symbols, or starts with 1 and has an even number of symbols (b) z over 0, 1 | r is any string except 11 and 1111 (c)over 0, 1) contains at least two Os and at most one 1 )