8.2 Advanced features of functions
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1. Assign default values to arguments
   * use of function as an example to understand what a
     default value of an argument means(0.42 - 2.40)
   
#. Calling function with their default arguments
   * An example to explain how a function is called by it's arguments(2.41 - 4.01)
   * Exercise 1: Redifine a function by interchaning it's default arguments(4.06 - 4.51)
   * Exercise 2: make a note of all the arguments with default values for 'linspace'(4.57 - 5.28)
   * Exercise 3: Call a function without any arguments(5.34 - 6.18)

#. Define and call functions with keyword arguments
   * Explanation with examples of keyword arguments(6.19 - 8.28)
   
#. Built-in functions available in Python standard library and the scientific computing libraries
   * What are built-in functions(8.36 - 9.07) 
   * Classes of functions in pylab, scipy(9.08 - 9.44)

#. Summary(9.45 - 10.02)

#. Evaluation Questions(10.03 - 11.34)