How many boxes are kept between the vacant shelf and Box F?

Study the following information carefully and answer the below questions Seven boxes E, F, G, H, I, J, and K are kept one above another in a shelf but not necessarily in the same order. One of the shelves is vacant. The bottom-most shelf is numbered as 1 and the topmost shelf is numbered as 8. G’s shelf number is a multiple of 2. The number of boxes kept above the Box K is same as that of below the Box K. Box K is kept at an odd numbered shelf. Only one box is kept between K and H which is kept at even numbered shelf. Box F is adjacent to Box H. Box I is kept on an odd numbered shelf. Box I is not kept below the vacant shelf. The number of boxes kept between the Box G and F is same as the number of boxes kept between the Box F and J.