Study the following information carefully and answer the questions given below it.
Nine friends L, M, N, O, P, Q, R, S and I are sitting in a circle facing the centre. T sits fifth to the right to R. N is not an immediate neighbour of either R or T. M sits between S and P. N sits fourth to the left of P. O sits second to the right of Q. S is not an immediate neighbour of T.
If all the nine friends are made to sit alphabetically in the clockwise direction starting from L, positions of how many will remain unchanged (excluding L)?