Hello You did a great job, but I had a few questions about entering the data, which you would like to answer. If the data is such that it has 2 properties or 2 columns called y z (one of these properties can be called x at the same time), it means that it actually has 3 columns. We have a few y and z for each x. How to register this data nugget in Excel? Can the time series method be used? What should I do? Thank you for your help

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