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The horizontal axis on the top plots z between 0 and l, marking l over 4, l over 2, and 3 l over 4 in between, while two vertical axes pointing downwards on the left and right mark t from 0 to 12 nanoseconds in increments of 1. The reflection coefficients are marked at the top of the diagram as gamma sub g equals negative 0.6 at the generator end and gamma sub L equals 0.5 at the load end. Two zigzag lines represent two step functions. The zigzag line with straight line segments indicates the first step function. It measures a voltage of 4 V between 0 and 2 nanoseconds, 2 volts between 2 and 4 nanoseconds, negative 1.2 volts between 4 and 6 nanoseconds, negative 0.6 volts between 6 and 8 nanoseconds, 0.36 volts between 8 and 10 nanoseconds, and 0.18 volts bouncing back from 10 nanoseconds. The second zigzag line with broken line segments indicates the second step function. It measures a voltage of negative 4 V between 1 and 3 nanoseconds, negative 2 volts between 3 and 5 nanoseconds, 1.2 volts between 5 and 7 nanoseconds, 0.6 volts between 7 and 9 nanoseconds, negative 0.36 volts between 9 and 11 nanoseconds, and negative 0.18 volts bouncing back from 11 nanoseconds.