Exercises 2.1 and 2.2.
Exercies 2.3.*.
Exercises 3.1.*.
Chapter 4 exercises.
Chapter 5.
Exercise 6.1.1
Exercise 6.2.3
Exercise 6.2.4
Exercise 6.2.5
Exercise 6.3.1
Exercise 6.3.2
Exercise 6.3.3
Exercise 6.4.1
Exercise 6.4.2
Exercise 6.4.3
Exercise 3.1.3
Exercise 3.1.4
Exercise 3.1.1
Finished secure coding.
Finished secure coding.