On four separate graphs, draw an indifference curve for each of the following "goods" and "bads":

a) Recycling bins and massages (2 goods with free disposal)

b) Toxic waste and headaches (2 bads)

c) Sunshine and economics lectures (2 goods without free disposal, meaning that they become bads when you have too much of them)

d) Beers and drives through the country, consumed at the same time (2 goods with free disposal that are deadly when combined)