Exercises
Exercise 2-1 complete
Exercise 3-1 complete
Exercise 16-1 completed
Exercise 4-1
Exercise 5-1 completed
Exercise 7-2 completed
Exercise 8-2 completed
Exercise 15-1 completed
Exercise 12-2 completed
Exercise 13-1 completed

Enhancements
Enhancement 2-1 not complete
Enhancement 4-1 In progress Enhancement 4
Enhancement 5-1 In progress
Enhancement 7-2 Enhancement 7
Enhancement 12-2 Enhancement 12
Enhancement 13-1 Enhancement 13