please answer all 3 parts

Note: This homework is about Languages and Grammars and Regular Expressions. Q. 1 Maximum score 15 Give the grammar for the following language Let L = {w {a, b}*: w ends with the pattern aaaa} Q. 2 Maximum score 15 Give the grammar for the following language L ={w {a, b}* : w contains an odd number of a's and an odd number of b's}. Q.3 Maximum score 20 Consider the following regular grammar G: S aT TT Ta TW W WaT Write a regular expression that generates L(G)