2.
This is a 90 degree anticlockwise rotation.
If a point X(x,y) is rotated 90 degree anticlockwise with respect to the origin, the new point X' would be X'(-y,x).
M' would be M'(5,3)
N' would be N'(-4,2)
3.
This is 180 degree rotation with respect to the origin.
If a point A(x,y) is rotated 180 degrees with respect to the origin, the new point A' would be A'(-x,-y).
A' would be (-1,-1).
B' would be (-3,-5).
C' would be (-5,-2).
