Here is a set of sample problems that might help you study for the first exam.
Sect. 11.1: 1-17, 22-27, 32-34
Sect. 11.2: 1-19, 23, 27, 34-40
Sect. 11.3: 1-19, 25-28, 34-36
Sect. 11.4: 1, 3, 5-15, 19, 20, 26, 31, 34-40
Sect. 12.1: 1-20, 28-36, 40-45
Sect. 12.2: 1-29, 38, 39
Sect. 12.3: 1-21
Here is a set of sample problems that might help you study for the second exam.
Sect. 13.1: 1-18, 23-29
Sect. 13.2: 1-29, 36-37
Sect. 13.3: 1-27,30-33
Sect. 14.1: 1-26, 33-36
Sect. 14.2: 1-26, 32-36
Sect. 14.3: 1-18, 21-24
Sect. 14.4: 1-22, 24-28
Here is a set of sample problems that might help you study for the third exam.
The second exam is on March 30. It covered chapters 11 and 12.
Here is the third exam of the semester.