i hope u can show the understanding working with correct answers

SET 1 QUESTION 1 (a) The sum of the first n terms of an arithmetic series is - (5n? -m). (i) Write down an expression for the sum of the first # -1 terms. [ 2 marks ] (C2, CLO1, MQF LODI) (il) Hence, show that the series is an arithmetic series. [ 3 marks ] (C2, CLOI, MQF LODI) (b) The sixth term and the third term of a geometric series are 1 and_ 486 18 respectively. (1) Find the common ratio of the series. [ 2 marks ] (C2, CLOI, MOF LODI) (ii) Determine the smallest integer value n such that .