Each of P, Q, R, S, T, U and V works as a field officer and has to travel on a different day of a week starting from Monday and ending on Sunday of the same week.

P has to travel on Tuesday. Only one person has to travel between U and P. T has to travel on the day immediately after U. Only two people have to travel between R and U. V has to travel on the day immediately before S. On which day does Q has to travel?