Read chapter 4 (Variables Expressions and Statements) and 6 (Keyboard Input) in

Read chapter 4 (Variables Expressions and Statements) and 6 (Keyboard Input) in the online book of Python 2: For Beginners Only and run all the examples and exercises. (delete allextra empty spaces before certain lines then you will encounter a syntax error message unexpected indent when you run the program. Fix the problem by deleting the extra indent.)