What are the weight and height limits for each mode of the Graco 4Ever DLX Grad car seat?

The seat supports rear-facing for children 4-40 lb and less than 49 inches tall, and forward-facing for 22-65 lb and less than 49 inches. Highback booster mode is for 40-100 lb children who are 43-57 inches tall and at least 4 years old, while backless booster is for 40-120 lb children at the same height range. Seat belt trainer mode is for children 50-120 lb, 43-60 inches tall, and at least 5 years old. (Page 1)