Wht should be the healthy weight and height of 4yr 5 months old boy

A. Approximately 17 kg would ideally be very good for a 4 1/2 year old child because every one year we expect the child to gain 2 kg on the basis of the minimal expectation that I am seeing is about 17 kg by the age of 4 1/2 and 18 by the age of five