What have you tried? Reflections, rotations, dilations and projections have standard structures but if you show us what you have tried (even a partial attempt) as well as any brainstorming you have tried.
Determine the new point after applying the transformation to the given point.use the induced matrix associated with each transformation to find the new point.
a) reflected about
b) rotated in the counter-clockwise direction.
c)Dilate by (i.e ) and then project at the y-axis.