Q10 in textbook is the whole question, they didn't me more information.

10. Show the result after each merge phase when merging the following two files: 6 12 19 23 348 11 17 20 25.9 10 15 25 35 13 21 27 28 29 7 30 36 37 39 11. Starting with the following file, show the contents of all of the files cre- ated using external sorting and the natural merge method (do not include a sort phase) 37 9 23 56 4 5 12 45 78 22 33 44 14 17 57 11 35 46 59