Answer
a. No.
b. Yes.
c. No.
d. No.
e. Yes.
Work Step by Step
a. No. The element \(d\) is in two sets.
b. Yes. Each element is in exactly one set.
c. No. The element \(4\) is in two sets.
d. No. The element \(6\) is missing.
e. Yes. Each element is in exactly one set.
