Lush&Green Lawn Services employs four lawn treatment specialists: Penny Esposito, Garland Falkland, Peter Raft, and Baozhai Suen. Each specialist drives a truck equipped with a small computer they use to record the details of the treatments they apply to each property. At the end of each workday, the computer on each truck uploads the data for the day to a cloud server, where the data are available in tab delimited files named esposito.txt, falkland.txt, raft.txt, and suen.txt. Import the data from these files, combine them to create a single set of data, and save the result as treatments.xlsx.