All questions are from Penney, Linear Algebra, 4th edition. For each question that's more than just a calculation, justify your reasoning in complete sentences. Please staple your work and label each problem clearly. Each problem is worth 5 points.
True or False questions 2.4 and 2.5 (p. 108), and 2.18 (p. 122).
Exercises 2.4, 2.11, 2.21 (pp. 109-112), and 2.35 (p. 124).
Pick another exercise from section 2.1 or 2.2 that looks interesting, and do it.