Write the first five terms of each sequence. Determine whether each sequence is arithmetic, geometric, or other. 1. a(1) = 7, a(n) = a(n - 1) - 3 for n > 2.

2. b(1) = 2, b(n) = 2 • b(n - 1) - 1 for n > 2.

3. c(1) = 3. c(n) = 10 • c(n - 1) for n > 2.

4. d(1) = 1, d(n) = n • d(n - 1) for n > 2.​