Which part of the name of a document indicates the program that was used to edit it?

Hi plz 11 ! when planning a table, what step comes first: "define the column headers" or "calculate the number of columns/rows"? a. calculate the number of columns/rows b. define the column headers

You are consulting for a beverage distributor who is interested in determining the benefits it could achieve from implementing new information systems. what will you advise as the first step?

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)