Answer:

proper subset: {2} {4} {6} {8} {2,4} {2,6} {2,8} {4,6} {4,8} {2,4,6}{2,4,8} {4,6,8} {}

improper subset: {2,4,6,8}

power set: i dont know, sorry

cardinality: 4

Answer:

Kulang Yan po dapat may B