Using the Gnuplot documentation, implement a script that plots four graphs. Use the data from data4.txt as follows: the first graph should plot columns 1 and 2, the second columns 1 and 3, the third one columns 1 and 4, and the fourth one should be a 3D graph plotting columns 1, 2 and 3.

• Use different colours for the data in each graph.
• Remove the keys for each graph.
• Give a title to each graph.
• Give names to each of the axes: X or Y (or Z for the 3D graph). In the case of the 3D graph: Make the numbers on the axes readable, and correct the position of the names of the axes if these are displayed over the axes numbers.
• Make the script generate the .eps file containing your plot.