Repeat Exercise 13.29 with the following modifications. Add a third operating step. For all three steps, use the same distillate rate and reflux rate as in Exercise 13.29. Use the following durations for the three steps: 13 hours for Step 1, 4 hours for Step 2, and 13 hours for Step 3. The distillate from Step 2 will be a slop cut. Determine the mole-fraction composition and amount in h o l e s of each of the four cuts.