I tend to follow dws around he seems to be the master of the thought provoking response. As he says here:

"When someone presents a "do my homework for me" question, particularly if they show no evidence of any effort on their part, please resist providing a direct answer. Instead, provide pointers, hints, and suggestions, and let them work to solve the problem themselves. Teach, don't solve. "

Good advice really.

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Life is a tale told by an idiot -- full of sound and fury, signifying nothing. William Shakespeare, Macbeth