HELP ASAP PLZ

Write the next three terms of the arithmetic sequence.
-12, 0, 12, 24, _, _, _

Write the next three terms of the arithmetic sequence.
0.2, 0.6, 1, 0.4, __, __,__

Write the next three terms of the arithmetic sequence.
4, 3 3/4, 3 1/2, 3 1/4 ,__, __, __