if you already know the expression grammer and dont want to do it again it's ok answer the question a - e please

The following is a partial list of C operators: Write an expression grammar for the above. Ensure correct precedence and associativity. Include support for parenthesis. Using your grammar for the above question, draw parse trees and syntax trees for: a) -a b * (-c - d) e*f+ g t e a=b=c=d*(e * (f + g)) + h c)