University Hospital conducted a study in order to describe the age (in weeks) at which infants learn to crawl. Consent forms collected from the parents of all the children born at the hospital last year who agreed to participate in future research projects were separated by the gender of the child. A random sample of 12 girls and a random sample of 12 boys were selected from the available consent forms. The parents of the randomly selected children were contacted, and the age at which their child learned to crawl was confirmed. The following data were obtained as a result.

Girls : 25, 23, 36, 27, 32, 31, 37, 40, 33, 29, 38, 34

Boys : 39, 28, 47, 29, 35, 44, 35, 24, 36, 27, 25, 36

Construct a stem-and-leaf plot with this data and describe the result.