Write a program that asks the user to enter a person's age. The program should display a message indicating whether the person is an infant, a child, a teenager, or an adult. Following are the guidelines:If the person is $1$ year old or less, he or she is an infant.If the person is older than $1$ year, but younger than $13$ years, he or she is a child.If the person is at least $13$ years old, but less than $20$ years old, he or she is a teenager.If the person is at least $20$ years old, he or she is an adult.