In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. -
3, 4, 7, 7, 13, 13, 21, 22, 31, 44,
Seven executives P, Q, R, S, T, U andW reach office in a particular sequence. U reaches immediately before P but does not immediately follow S. R is the last one to reach office. T follows immediately after P and is subsequently followed by W.
Among the executives, who reaches the office first ?