text: def multiply_by(a, b=2, c=1):
      return a * b + c
  
  
  print(multiply_by(3, 47, 0))  # Call function using custom values for all parameters
  print(multiply_by(3, 47))  # Call function using default value for c parameter
  print(multiply_by(3, c=47))  # Call function using default value for b parameter
  print(multiply_by(3))  # Call function using default values for parameters b and c
  print(multiply_by(a=7))  # Call function using default values for parameters b and c
  
  
  def hello(???):
      print(f"Hello {subject}! My name is {name}")
  
  
  hello("PyCharm", "Jane")  # Call "hello" function with "PyCharm as a subject parameter and "Jane" as a name
  hello("PyCharm")  # Call "hello" function with "PyCharm as a subject parameter and default value for the name
  