The income effect of a price increase for a Giffen good outweighs the substitution effect

At each of the three points in the following graph, indicate whether planned aggregate expenditure is greater than, equal to, or less than GDP?

What will be an ideal response?

Your new neighbor does not mow his lawn or prune the trees in his front yard. As a result, your house value decreases. Your neighbor generated

A) a negative externality. B) a positive externality. C) no externality. D) a non-rival good.