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power sets problem
P(A) denotes the power set of A and denotes the empty set. Write the power
sets of the following
a. P(ф)
b. P({ф})
c. c. P (ф, {a},{ф,a})
d. P (ф, {a}, {b},{b, a})
please help me,I could not solve the problem(Headbang)
You can also see the attachment
it is question no 2.
also if u can do the other quesions particularly 3,4,10 i would be grateful

Do you know the definition of power set?
If so what is it?
Is the empty set a subset of every set?
Is the empty set an element of every power set? Why or Why not?
In the other question that I answered, you responded that you did not know the symbols. How are you studying the material if that is so?