How many unknown person sits in the table?

Study the given information carefully and answer the following questions. Certain numbers of people are sitting in a Circular table facing towards the centre of the table. Only few of them names and seating positions are known. Y sits immediate right of
X. No known person sits near to
C. G is not an immediate neighbour of
D. There are seven person sits between Y and F when counted from the left of F. Number of person sits between C and Y when counted from the right of Y is equal to the number of persons sits between O and F when counted from the left of F. F is an immediate neighbour of E. G sits third to the left of W who sits sixth to the right of E. Only one person sits between E and
D.Only two people sit between W and Y. Z sits third to the right of
X.