File Appending

Question

 first open 2 files second  put 5 Numbers in File1 (File should be text file) third put 6 Numbers in File2(File should be text file) next open third File3 and append both File1 and File2 in this File then arrange the numbers which has appended in File3

 

                                        File 1

 5         4            3             2              9

                                               

                                                 File2

 9                5               99           48                 25                  32

 

                                              File3

 2            3           4             5             5            9               9               25            32                 48                     99