1. (10 pts) Construct regular expressions for the following languages (a) over 0, 1 a starts with 0 and has an odd number of symbols, or starts with 1 and has an even number of symbols ) (b) x over 0,1 is any string except 11 and 11) (c) over 0,1) has even number of 1's ] (d) [ax over [0, 1} | x contains at least two Os and at most one 1 )