The terminal voltage and current of a linear electrical network shown in Figure (a) are given in the table.
| Terminal voltage (\(v_t\)) | Terminal current (\(i_t\)) |
|---|
| 18 V | \(-0.5\) A |
| 30 V | 0.5 A |
| 36 V | 1.0 A |

The correct choice for the parameters (\(I_N\), \(R_N\)) of the Norton equivalent circuit shown in Figure (b) is: