18 (a) These are the first five terms of a sequence. 7 a b c 31 In the sequence, the same number is added each time to obtain the next term. Find the value of each of the terms a, b and c. a = .................................................... b = .................................................... c = .................................................... [2] (b) These are the first five terms of another sequence. 4 11 18 25 32 (i) Find the nth term of the sequence. ............................................... [2] (ii) Show that 361 is a term in the sequence. [2] © Cambridge University Press & Assessment 2022 0580/03/SP/25 [Turn over 18