In each part of this problem, information about a sequence or series is given. Use the given information to determine the requested information.a) sequence is arithmetic, with a3 = ?8 and a = ?26; find a10b) series is arithmetic, with S21 = -1764 and a? = 1; find dc) series is geometric, with a2 = -8/3 and a5 = 64/81; find S6d) series is geometric, with r = -2 and S5 = 33; find a3