Please help for the following problem.

={a,b}, L = {s: s starts with ab, ends with ba, and # a (w) > # b (w)}. For

example, abababa L; s = abba L because # a (s) = # b (s); t = abaab L because t does not

end with ba. Prove that L RLs using the RL pumping theorem. Define w in terms of k, the

pumping length, and remember that the only valid assumption about k is that k 1. Deriving

formulas for x and z would waste your time, so please just concentrate on y.