Terry, a student, performs a titration. he completes these steps as part of his titration procedure: 1. he cleans and rinses a burette with standardized base. 2. he fills the burette with standardized base solution. 3. he reads and records the initial burette volume. 4. he adds a base from the burette to an acid. 5. he observes a color change in the erlenmeyer flask. 6. he stops the addition of base from the burette. 7. he reads and records the final burette volume. which steps will provide information needed to calculate the volume of base needed to reach the equivalence point? 1 and 6, 3 and 7, 3, 4, and 6, or 1, 2, and 7?