Write a python program to print the name and age of all customers in a list.
customers = [
 {'name': 'John', 'age': 25},
 {'name': 'Bob', 'age': 40},
 {'name': 'Alice', 'age': 10},
 {'name': 'Mark', 'age': 35},
]
for customer in customers:
  print(f"Name: {customer['name']}, Age: {customer['age']}")