1. (5 points) We have the following grammar with the start symbol 0 1213141516171819 (a) Show a leftmost derivation for the expression "2 3 (b) Show a rightmost derivation for the above expression (c) Show two different parse trees for the above expression (d) The grammar is ambiguous. Show a new grammar that removes the ambiguity and makes "*" and " left-associative. Show the parse tree for "2 3 6" in your new grammar. Argue why this is the only parse tree in the new grammar (e) Show a new grammar that removes the ambiguity and makes " and "/" right-associative. Show the parse tree for "2* 3/6" in the new grammar