You are faced with the following alternative choices on Saturday afternoon. You can only do one of these activities. None of these activities will require you to spend any money. Choice A: Go hiking. Choice B: Work out using exercise equipment in your garage. Choice C: Stay at home and practice playing the violin. It turns out that Choice A is your most preferred activity, Choice B is your second most preferred activity, and Choice C is your least preferred activity. You choose to work out in your garage. What is the opportunity cost of your decision to work out