input: Write a python function to calculate the average age from a list of dictionaries containing names and ages.
  assert calculate_average_age([{'name': 'John', 'age': 25}, {'name': 'Mia', 'age': 28}, {'name': 'Jack', 'age': 33}]) == 28.666666666666668
  assert calculate_average_age([{'name': 'Alice', 'age': 40}, {'name': 'Bob', 'age': 50}, {'name': 'Charlie', 'age': 60}]) == 50.0
  assert calculate_average_age([{'name': 'Tom', 'age': 20}, {'name': 'Jerry', 'age': 30}]) == 25.0
output: def calculate_average_age(people):
      total_age = sum(person['age'] for person in people)
      return total_age / len(people)