hello. can i have help with both parts please. thank you!

2: (a) For each ketoester below, indicate whether or not it can be prepared using the Claisen condensation reaction (circle YES, if it can be prepared or NO, if it can't be prepared). (15 points) YES NO YES NO B YES NO (b) Indicate which of the ketoesters in problem 2a (A, B or C) will have the most acidic -hydrogen? Briefly explain (10 points)