For the following APs, write the first term and the common difference: (i) 3, 1, -1, -3, \ldots (ii) -5, -1, 3, 7, \ldots (iii) \(\frac{1}{3}, \frac{5}{3}, \frac{9}{3}, \frac{13}{3}, \ldots\) (iv) 0.6, 1.7, 2.8, 3.9, \ldots