Add punctuation: Arrange the pieces correctly to figure out the image To swap a pieces position click on the piece and then the neighboring one
A: Arrange the pieces correctly to figure out the image. To swap a pieces position, click on the piece and then the neighboring one.

Add punctuation: 21 The six companies
A: 2.1 The six companies

Add punctuation: 423 Who was the first to be cured by gene therapy
A:
4.2.3 Who was the first to be cured by gene therapy?