Question: In Problems 1-3, find parametric equations for the given curve. (Be sure to give the domain for the parameter t) 1. The circle centered at

In Problems 1-3, find parametric equations for the given curve. (Be sure to give the domain for the parameter t)
1. The circle centered at the origin having radius 3
2. The circle centered at (2, 1) having radius 1
3. The semicircle x2 + y2 = 4 with y > 0

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