Can somebody please help me out with this problem?

a. -3

b. 324, -972, and 2,916

Step-by-step explanation:

a. Common ratio:

-108/36 = -3

36/-12 = -3

-12/4 = -3

Therefore, the common ratio = -3

b. To get the next three terms, multiply the each consecutive term by the common ratio.

Thus:

-108 × -3 = 324

324 × -3 = -972

-972 × -3 = 2,916

Therefore, the next three terms of the sequence are:

324, -972, and 2,916