Explain why the frail-type indifference curve pictured, UF , is not a valid indifference curve. b Draw your own version of this figure and label two contracts, A and B. Draw the two contracts such that: contract A is strictly better than B, with more income in both states of the world, and the customer with the pictured indifference curve nonetheless prefers contract B to contract A. c Draw a valid version of a frail-type indifference curve that intersects 1, 2, and the full-insurance line. d Is (1,2) a valid separating equilibrium? Defend your answer.