a- polished wooden table- regular reflection since the surface is polished (plane)

b-chalk powder-diffused reflection will occur because the surface of chalk powder is uneven

c- cardboard- diffused reflection of light since cardboard has an uneven surface

d- mirror- regular reflection since the surface of a mirror is plane

e- paper- diffused reflection since the surface of paper is uneven

f- marble floor with water spread over it- regular reflection as the floor with water will behave as a plane surface