Answer
a.2D
b.2D
c.3D
Work Step by Step
a. Designing the layout of magazine page is applicant of 2D graphics because layout means visual arrangement of elements.
b. it is an applicant of 3D graphics because MS Paint does not support 3D graphics. For 3D graphics Paint 3D is used.
c. It is an applicant of 3D graphics because Objects would be designed to give look of the real world.