Write a python function copy(source1, source2, dest), where source1, source2, dest are string-valued variables that represent filenames. The funciton should first erase (the content of) the file dest, and then copy the files source1 and source2 one after another into files dest. [Use Python file commands.]

(B) In the same directory as your program, create a file FF1, and write into it Hello (with a space at teh end). Similarly, create a file FF2, and write into it world! (with a new line, i.e., an ENTER at the end). And create a file DD and write into it Destination.

Show how you run copy with these files. Show what is in these files afterwards.