If A={1,2}A = \{1, 2\}A={1,2}, what is P(P(A))P(P(A))P(P(A))?
{∅,{1},{2},{1,2}}\{\emptyset, \{1\}, \{2\}, \{1, 2\}\}{∅,{1},{2},{1,2}}
{∅,{∅},{{1}},{{2}},{{1,2}},… }\{\emptyset, \{\emptyset\}, \{\{1\}\}, \{\{2\}\}, \{\{1, 2\}\}, \dots\}{∅,{∅},{{1}},{{2}},{{1,2}},…}
P(A)P(A)P(A)
None of the above