Determine phase of life

Write a program that reads an age, and finds out if someone is in their babyhood, childhood, adolescence, initial adulthood, mature adulthood, or old age. Use the following approximate definitions:

• Babyhood starts at birth and ends at 2 years of age.

• Childhood ranges from 2 to 12 years of age The adolescence corresponds to the age ranging from 12 to 20 years.

• Initial adulthood ranges from 20 to 40 years of age.

• Mature adulthood begins at age 40 and ends at age 60.

• Old age goes from 60 years on wards.

Run tests and ensure that each of the possible outputs has occurred at least once.

Add minimal line saying the should test such that each possible
output has occurred.