a) In Figure below, an indifference curve for a certain consumer. Calculate an estimate of her marginal rate of substitution, MRS, in point A.

b) Can we say anything about whether point B is better or worse for the consumer, as compared to point A?

c) What about point C?

d) Draw a diagram for two goods, with the quantity of good 1 on the X-axis. What will the indifference curves for substitute goods look like? What will they look like for complementary goods?