1. True/False (5 points each) When using utilities, you must consider all of your decisions at the same time. b. If your subjective utility function is not concave, then your utilities are said to be incoherent. C. People generally have more trouble assessing very small probabilities than moderately sized probabilities. d If you are indifferent between A and B. then your utility for both of them must be 0. The axiom of substitutability states that if you are indifferent between a gamble and a sure thing, you can replace the gamble with the sure thing in a decision tree, and vice versa