From the information given, find the quadrant in which the terminal point determined by `t` lies.
For each question, enter I, II, III, or IV.
(a) `\sin (t)<0 ` and `\cos (t)<0 `, quadrant
(b) `\sin (t)>0 ` and `\cos (t)<0 `, quadrant
(c) `\sin (t)>0 ` and `\cos (t)>0 `, quadrant
(d) `\sin (t)<0 ` and `\cos (t)>0 `, quadrant
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