The following is a preview of the DataFrames df_1. Which of the following statement(s) are true? df_1 date temperature humidity 2018/01/01 70 85 2018/01/02 68 80 2018/01/03 71 80 df_1 is in long format because each row represents an observation and each column represents a variable. df 1 is in wide format, i.e, each row is 1 record of an observation and each column represents a feature about a record. A dataframe cannot be seen as a table.

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