Answer:Arithmetic: (4, 8, 12, 16, ...) (3, 8, 13, 18, ...)Geometric: (2, 6, 18, 54, ...) (5, 10, 20, 40, ...)Neither arithmetic or geometric: (5, 10, 20, 30, ...)Step-by-step explanation:Arithmetic sequences are sequences where all of the numbers have a common difference.4, 8, 12, 16, ... all have a common difference of 4.3, 8, 13, 18, ... all have a common difference of 5.Geometric sequences are sequences where all of the numbers have a common ratio.2, 6, 18, 54, ... all have a common ratio of 3.5, 10, 20, 40, ... all have a common ratio of 2.Sequences that are neither arithmetic or geometric do not have common differences or common ratios.5, 10, 20, 30, ... does not have a common difference or a common ratio