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

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