Direction: Study the following information carefully to answer the given questions:

The certain number of boxes are placed one above another. The boxes have consecutive numbering. Each box contains marker of different colour. The box containing Red and Purple colour marker are at top or bottom of the stack. There are as many as boxes below the box containing green marker as above the box containing yellow marker. The box containing black marker is at the middle of the stack. There are as many as boxes between box containing blue marker and brown marker as between box containing white marker and cyan marker. The box containing red marker is at the top of the stack and numbered as one. The box containing cyan, purple and yellow markers are placed at the number which are divisible by three. The box containing blue marker is placed above the box containing black marker. The box containing brown marker is placed at prime numbered box which is greater than 3.