Any of several regulars here can help you. What have you done so far? What don't you understand? Post your ladder logic and your specific questions and we'll try to steer you in the right direction.
What we won't do is just hand you the solution. Most of us here are of the opinion that if we give you a fish you can eat for a day, if we teach you how to fish you can eat for the rest of your life. Far too many students come here expecting to have their homework done for them. I'm sad to say that a significant percentage of them are from Great Britain. I hope you're out of a different mould.