please answer this question 27. The sum of first 9 terms of an arithmetic sequence is 45 and the sum of first 18 terms is 171.
(a) What is the sum Of its 10th to 18th terms ?
(b) VVhatis its 5th term ?
(c) Find its 14 HI term,
(d) Find the sum of 5th to 14th terms.
please answer this question