How do you write the set in roster form and in set builder notation?

D is the set of whole numbers less than 3.

AD = {0,1,2,3,4,5}; D = {x is a whole number, x < 3}
BD = {0,1}; D = {x | x < 3}
CD = {0,1,2}; D = {x | x is a whole number, x < 3}
DD = {0,1,2,3,4,5,6,7}; D = {x < 3}