help me answer the question

13.13 Assess your risk tolerance (R). Now rescale your exponential utility function-the one you obtain by substituting your R value into the exponential utility function-so that U($100) = 0 and U($20,000) = 1. [That is, find constants a and b so that a + b(1 - e-100/R) = 0 and a + b(1 - e-20,000/R) = 1.] Now plot the rescaled utility function on the same graph with the utility assessments from Problem 13.12. How do your assess- ments compare