Which of the following correctly describes the relationship between these times?
tP>tQ≈tRt_P > t_Q \approx t_RtP>tQ≈tR
tP≈tQ>tRt_P \approx t_Q > t_RtP≈tQ>tR
tP≈tQ≈tRt_P \approx t_Q \approx t_RtP≈tQ≈tR
tR>tQ>tPt_R > t_Q > t_PtR>tQ>tP