нужно поставить 4 типа вопросов к следующему предложению three of the indexes are daily averages of the cost-per-share of selected stocks in three major economic sectors : industry? transportation and utilities

1 Are these three of the indexes to represent daily averages of thecost-per-share of selected stocks in three major economic sectors :industry, transportation and utilities?
2 What three of the indexes are daily averages of thecost-per-share of selected stocks in three major economic sectors :industry? transportation and utilities?
3 What are these three of the indexes used for?
4 What are daily averages of thecost-per-share of selected stocks in three major economic sectors?

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