In each of the following sequences in (a) and (b), identify whether the sequence is an Arithmetic Progression (AP) or a Geometric Progression (GP), or neither; [1 mark] if it is an AP or a GP, write down the first term and the common difference or ratio; otherwise, show that there is no common difference or ratio; [1 mark] write down the general term; and [1 mark] find the sum of the first 10 terms. [1 mark] a) 12, 8, 4, 0, 4, b) 3, 9, 27, 81, 243,