Mateo loves root beer floats, which he makes by combining one glass of root beer and two scoops of ice cream. Lena is on a diet that assigns points to food and drinks. One glass of root beer is one point and one scoop of ice cream is one point. She can consume any combination of root beer and ice cream as long as the total number of points is two.

1. What kind of goods are root beer and ice cream for Mateo?
2. Draw a graph showing his indifference curve
3. What kind of goods are root beer and ice cream for Lena?
4. Draw a graph showing her indifference curve.