2. Find a regular expression for each set described below. [2+3+5=10] (a) L1={ww and starts with 01 and ends with 10}, where ={0,1} (b) L2={ww and starts with a 1 and every 0 is immediately preceded by at least two 1s}, where ={0,1} (c) L3={ww and in w every 2 is immediately followed by exactly two 0 s and every 1 is immediately followed by either 0 or else by 20}, where ={0,1,2}