Define a function that takes 3 filepaths(type: strings) as parameters. The function should combine lines from first file with corresponding lines in the second file. Save the results in the 3rd filepath.

File1:

        A for
        B for
        C for
        D for

File2:

         Apple.
         Ball.
         Cat.
         Dog.

File3:

         A for Apple.
         B for Ball.
         C for Cat.
         D for Dog.