Cramer Answers Twitter Questions on Merck, Shake Shack and Google

Jim Cramer answers viewers' Twitter questions from the floor of the New York Stock Exchange. He weighs in on Merck, which he says he likes very much for reasons like its buyback and plans in the pipeline. Cramer also reveals his thoughts on Shake Shack, which he believes is a great brand and is going to have solid brand loyalty. But, he cautions that the stock is currently overvalued. When it comes to the airlines, Cramer warns to steer clear. He explains that airline stocks don't go up very much when oil goes down anymore and they go down hard when oil goes up, making them ones to avoid. Plus, Cramer reveals his insights on Green Mountain Coffee, Google and Bank of America. Tweet your questions @jimcramer every Monday using #CramerQ.