c++

The data.txt text file contains a number on the first line, n, followed by n lines with three nan each line as shown below: Linda Adam do Mina Bobelive John Xavier Dana Tim Emily Katie Write a program to do the following: Open the file Read the number on the first line into variablen If nis Oor negative o display an error message of your choice. Ifnis 1 or above do the following: 6 Read three names from the file into three variables Determine the name that would be first in alphabetical order (the smallest) Display this name Repeat this process for all remaining lines Close the input file Expected output for the above example, Adam Bob DO Emily