2. Answer the following questions with a solution. a) Find the a12 term in the given sequence -2, 6, -18, 54 ... b) Given a term in an arithmetic sequence and the common difference, the first five...

Extracted text: 2. Answer the following questions with a solution. a) Find the a12 term in the given sequence -2, 6, -18, 54 ... b) Given a term in an arithmetic sequence and the common difference, the first five terms of the sequence are: a40 = -1191, d = -30 c) Find the sum of the first 20 terms of the geometric series 5/2 + 5/6 + 5/18 + If your answer is not exact, write your answer up to two (2) decimal places.