So fragment one and fragment three, the side fragments, are also known as the arms. And this is the center of the middle, fragment number two. Now, what we can do is we can essentially separate these DNA molecules and then we can remove the fragment number two. And instead of fragment number two, we can place some type of target DNA molecule that we actually want to copy. And we can connect these two fragments onto the size of the target DNA molecule so that the actual size of the DNA does not change compared to the DNA of that lambda phage that we initially extracted. Now, how can we connect these two fragments or these three fragments?