please explain part 3 of this question Worked Example 2 Dot Diagram RACTIS The dot diagram represents
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![image text in transcribed](https://s3.amazonaws.com/si.experts.images/answers/2024/06/6678f0a4887ef_9566678f0a44ade7.jpg)
please explain part 3 of this question
![image text in transcribed](https://s3.amazonaws.com/si.experts.images/answers/2024/06/6678f0a549dfd_9576678f0a510876.jpg)
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