Do exercises 3.1, 3.2 (in the exercise 3.2., do #1 and #4 items only) in chapter

Do exercises 3.1, 3.2 (in the exercise 3.2., do #1 and #4 items only) in chapter 3 and exercise 4.2 in chapter 4 from the Brancati textbook.
Exercise 3.1 is worth 2 points.
Exercise 3.2 (#1 and #4) is worth 1.5 points.
Exercise 4.2 is worth 1.5 points (only do example 1)