Identify the value of the missing term in each geometric sequence.
1 . 4___36, 108, 324
2. 5, 20, ___320
3.___! 5, 5/2, 514
4. 6, -6, 6, -6,___
5. 0.216, 0.36, ___1,
6. ___20, 4, 4/5, ...​