I think that question, like the question about stock, is largely to make you think about the problem, and see how you react to it. Obviously, it's not possible

I think that question, like the question about stock, is largely to make you think about the problem, and see how you react to it. Obviously, it's not possible to produce a number with any real meaning; just discuss potentialities, grand strategy, basically the conceptual framework you'd use for producing that number. NB: As usual, this is me, guessing. Only pg knows for sure. :)