Problems 9-12, determine the common ratio, the fifth term, and the nth term of the geometric sequence. 9. 144, 24, 4, 2, 3'... 11 48, -2, -7, ! _ 1 8' Problems 13 -16, find the sum of the first n terms of the geometric sequence. 13. Find the sum of the first 9 terms for the sequence. 4, 12, 36, 108, ... 15/ Find the sum of the first 10 terms for the erms for the sequence. 5, 10, 20, 40, ... sequence 10 2'4