QUESTION 1 (a) The third and sixth term of an arithmetic progression are -8 and 4 respectively. Find i. The first terms and the common difference ii. The sum of the first six terms. (b) The seats in a lecture hall are aranged in a sequence such that the first row has 30 seats, the second row has 34 seats, the third row has 38 seats and so on. How many seats are there in the lecture hall if there are 20 rows?

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