Rotation Shape F: About the Origin vs About a Point C

Generalizing the Point-to-Point rule of Rotations.
Question 1
What are the coordinates of B[sup]l[/sup][br]when figure F is rotated 90 degrees about the origin counter-clockwise?
Question 2
What are the coordinates of B[sup]l[/sup][br]when figure F is rotated 90 degrees clockwise about the origin?
Question 3
What are the coordinates of B[sup]l[/sup][br]when figure F is rotated 180 degrees about the origin?
Question 4
What are the coordinates of B[sup]l[/sup][br]when figure F is rotated 90 degrees counter-clockwise about the Point C at (2, 3)?
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– dgoldstein, Edward Knote

Information: Rotation Shape F: About the Origin vs About a Point C