A. For each given geometric sequence, find the sum of the first: 1. 5 terms of 12, 9, 27/4, ... 2. 7 terms of 2, 6, 18, … 3. 6 terms of –5, 5, –5, 5, … 4. 7 terms of –3, 3, –3, 3, … 5. 8 terms of 2/3, 2/3, 2/3, ...​