Consider the following statements regarding Saturn:

1. Saturn is composed mainly of hydrogen and helium, whereas its rings consist of billions of pieces of bright-white water ice and rock.

2. Only four spacecraft have visited Saturn, all launched by NASA.

3. NASA launched the Clipper mission to study Saturn’s moon Europa, which is similarly dynamically linked to Saturn and contains a subsurface ocean as well.

Which of the statements given above is/are correct?