Answer: -19, -23, -27, -31, . . .
Each term is obtained by adding \(d\) to the previous term: \(t_1 = a\), \(t_2 = a + d\), \(t_3 = a + 2d\), \(t_4 = a + 3d\).
\(t_1 = -19\), \(t_2 = -23\), \(t_3 = -27\), \(t_4 = -31\)
So the A.P. is -19, -23, -27, -31, . . .