Four teenagers A, B, C and D have three kinds of electronic products: mobile phone, computer and camera   Two, three people have a cell phone, two have a computer, and only one has a camera
A
  Three, each person owns at least one of the three electronic products;  Four,Whether A and B have a computer is the same (either both or neither of them have a computer);  Five, Whether B and C have mobile phones is the same;  Sixth, C and D are different in whether they have mobile phones