State which ofthe following sets are finite and which are infinite. Give reasons for your answer.
a. {x: x ∈ N and x≤5}
b. C={1^2,2^2,3^2, ....}
c. D={1,2,3,4}
d. {x: x is a day of the week}
e. A={x: x ∈ N and x < 100}