If `A={phi,{phi},1.{1,phi},7}`, then Which of the following are true ?

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {phi,{phi},{1,phi}}sub A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {7,phi} sub A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {phi} in A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {{phi}} sub A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? phi in A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {7,{1}} cancel sub A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? 7 sub A

let A = {phi,{phi},1,{1,phi},7} . Which of the following are true? {1} in A

Let A={phi{phi},1,{1,phi},2}. Determine which of the following is true or fase.

Let A={phi{phi},1,{1,phi},2} . Determine which of the following is true or false. (a).ϕ∈A (b).2⊂A (c).{2,{1}}⊂A