If lines AB, CD, and EF are all parallel, then they will all have the same slope. Since the slope of line AB is \( \frac{5}{3} \), the slopes of lines CD and EF will also be \( \frac{5}{3} \).
So, the slopes of all three lines are:
- Slope of AB: \( \frac{5}{3} \)
- Slope of CD: \( \frac{5}{3} \)
- Slope of EF: \( \frac{5}{3} \)
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