1. choose the correct solution in roster form. n is the set of natural numbers that are factors of 12. a.{1, 2, 3, 4, 6} b.{1, 2, 3, 4, 6, 12} c.{1, 2, 3, 4, 5, 6, 8, 12} *this is my answer d.{1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12} 2. write the solution to the inequality in set-builder notation. 5r + 8 < 63 a.{r|r< 11} b.{r|r< 15} c.{r|r< 71} d.{r|r< 8} 3. suppose u = {1, 2, 3, 4, 5, 6, 7, 8} is the universal set and p={2, 4, 6, 8}. what is p? a.{2, 4, 6, 8} b.{1, 2, 3, 4, 5, 6, 7, 8} c.{1, 3, 5, 7} d.{1, 3, 5, 7, 8} for problems 4-5, use the following information. suppose u = {0, 1, 2, 3, 4, 5, 6}, a= {2, 4, 6} and b = {1, 2, 3}. tell whether each statement is true or false. 4. a u a. true b. false 5. b a a. true b. false