Problem: The 2000 CDC growth charts use a reference population of both breast-fed and formula-fed infants. Breast-fed babies tend to gain weight more rapidly than formula-fed babies in the first 2 to 3 months of their lives, but they tend to weigh less than formula-fed babies from 6 to 12 months. Mahadev is a healthy baby who was exclusively breast-fed for his first 12 months. Which of the following is most likely a description of his weights (at 3, 6, 9, and 12 months of age) as percentiles of the CDC growth chart reference population?