How many persons live between K and I?

Study the following information carefully and answer the question given below: There are seven people H, I, J, K, L, M and N are living in a 7 floor building on different floors from top to bottom (such as ground floor is numbered as 1 and top floor is numbered as 7) but not necessarily in the same order. H lives on the 2nd floor. L live immediately above
M. I live above
M. H lives immediately above K and immediately below N. There are four persons live  between K and J.