Consider alphabet V={a,b,c}

Question

Given two words W=abc and Q=cba.
1.Calculate W^0,W^1 and W^2.
2. Calculate Q^2 concatenate W
3. Calculate the |W| and |W^2|
4. Give us the mirror of WQ^2

Answer 1

1.
- W^0 = ε (empty word)
- W^1 = abc
- W^2 = abca

2.
Q^2 = cbacba
Q^2 concatenate W = cbacbaabc

3.
|W| = 3
|W^2| = 4

4.
The mirror of WQ^2 would be WQ^2 reversed, which is cbaabcabc.