A nurse is discussing growth with the parents of a 6-month-old infant who weighed 7 lbs at birth. Which statement best reflects the expected weight at this age?

"Your baby should weigh about 15 lbs by now."

"Your baby should weigh about 25 lbs by now."

"Your baby should weigh about 20 lbs by now."

"Your baby should weigh about 10 lbs by now."