this is a public economic questions 9. In one sentence state whether each good below is private, pure public, or partially public.  Golden Gate Bridge  F-35 fighter jet  11th Grade education in California  Jamoca Almond Fudge ice cream from Baskin-Robbins  This ECN 130 course at UCD  The air that we breathe  My Lego watch  Lake Tahoe  A 70 MPH speed limit on interstate highways  Local weather forecasts 10. Very briefly explain in words and/or graphs why we say that to determine the "efficient" quantity of a PPRIVATE GOOD we add up the individual demand curves for this good horizontally. 11. Very briefly explain in words and/or graphs why we say that to determine the "efficient" quantity of a PUBLIC GOOD we add up the individual demand curves for this good vertically.