The ring gear on a planetary geartrain similar to Figure 8.38 has 60 teeth and is rotating

Question:

The ring gear on a planetary geartrain similar to Figure 8.38 has 60 teeth and is rotating clockwise at 120 rpm. The planet and sun gears are identically sized. The sun gear is rotating clockwise at 150 rpm. Calculate the speed and rotation direction of the carrier.

Figure 8.38