Let Us Assess Choose the letter that best answers the question. Write your answer on the space provided before each number. 1. What do you call a collection of well-defined objects? a. Set c. Null Set b. Universal Set d. Subset 2. Which among the follow set is written in the roster method? a. Set A is the set containing the elements 1, 2, 3, 4, and 5 b. A={x|XEN, 0 < x < 6) c. A - {1, 2, 3, 4, 5 d. Both b and c 3. What do you call a set that does not contain any element? a. Set c. Null Set Iniversal Set d. Subset h​