Hint: sometimes it's hard to see the details on this tree. It might be best to save this tree to your computer/device, and then open the tree.
The tree above includes Big Y results for several L161+ L1498+ people and the branch at the bottom has three Big Y results for L161+ PF4135+ people. (This tree has a branch at the top for L161+ L1498- L161- but no Big Ys for this group are included).