How to solve h+1 in no. C

And need help with 3 (a),(b)

Thanks

(c) Find a regular expression r such that Lr)is the same language as L (b aba ,(ab) i,aa: n, m 21,20. (a) Give a regular expression (ab +b) ab), find an nfa to accept the rebular language L). 2 (b) Find the regular grammer which generates L()