1. Find the 25th term of the arithmetic sequence ‒7, ‒4, ‒1, 2, ... 2. In an arithmetic sequence, if a4 = 18 and a10 = 30, determine a1, d, and an. Then write the first four terms of the sequence. 3. In a geometric sequence, if a3 = ‒5 and a6 = 40, determine a1, r, and an. Then write the first three terms of the sequence.