Does anyone know how to remove specific columns of data sets in R studio?

When creating a presentation in libre office impress, where does the editing of slides take place?

What is wi-fi infrastructure? a metropolitan area network that uses radio signals to transmit and receive data a communications technology aimed at providing high-speed wireless data over metropolitan area networks a means by which portable devices can connect wirelessly to a local area network, using access points that send and receive data via radio waves includes the inner workings of a wi-fi service or utility, including the signal transmitters, towers, or poles and additional equipment required to send out a wi-fi signal

Uget brainliest if accurate mary has been given the responsibility of hiring a person for the position of a software testing officer. which management function would mary achieve this responsibility?