peggy is worried because her 9-month-old infant son's weight-for-length plots at the 99th percentile. she knows about many health risks associated with obesity and she is worried her son will have obesity as a child and perhaps as an adult. peggy is wondering if she should limit her son's food and beverage intake and/or start giving him fat-free cow's milk instead of infant formula. which of the following is accurate information about infant weight status that you could share with peggy?