If the number of occupants of bus R is more than 7 and is an odd number which is divisible by 3 but not 5, how many occupants are there in bus R

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Each of the six buses R, S,T,U,V and W has different number of occupants. T has more of participants than R and S but less than V. U has less number of occupants than only W. S does not have the lowest number of occupants. The bus having second lowest number of occupants has 20 occupants and the bus having second highest number of occupants has 64 occupants. T has 21 less number of occupants than U.

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C,D,E,F,P,Q,R and S are sitting around a circular table facing the centre with equal distance between each other (but not necessarily in the same order). Each one of them is also related to D in some way or the other. P sits third to the right of E. D sits to the immediately left of E. Only one person sits between P and D’s son. R sits to the immediate right of D’s son. Only three people sit between D’s husband and R. Only one person sits between D’s husband and C. F sits to the immediate right of Q. D’s father sits second to the right of F. Only three people sit between D’s father and D’s brother.

D’s daughter sits second to the right of S. D’s sister sits third to the right of D’s mother.