Let `A = {phi,{phi},2,{2,phi},3}`, which of the following are true?
`{phi,2,3} sub A`

Let A = {phi, {phi},2,{2,phi},5} . State whether the following is true of false? Justify your answer . {phi, {phi},2, {2,phi}} sub A .

Let A = {phi, {phi},2,{2,phi},5} . State whether the following is true of false? Justify your answer . {5,phi} sub A .

Let A = {phi, {phi},2,{2,phi},5}. State whether the following is true of false? Justify your answer . {{phi}} sub A .

Let A = {phi, {phi},2,{2,phi},5} . State whether the following is true of false? Justify your answer . {{5},{2}} (cancel sub) A .

Let A = {phi, {phi},2,{2,phi},5}. State whether the following is true of false? Justify your answer . phi in A .

Let A = {phi, {phi},2,{2,phi},5} . State whether the following is true of false? Justify your answer . {phi} in A .

Let A = {phi, {phi},2,{2,phi},5}. State whether the following is true of false? Justify your answer . 5 sub A .

Let A = {phi, {phi},2,{2,phi},5} . State whether the following is true of false? Justify your answer . {2} in A .

Let A = { 1, 2, { 3, 4 }. 13 }. Which of the following statements are incorrect and why? phi in A

Let A = { 1, 2, { 3, 4 }. 14 }. Which of the following statements are incorrect and why? phi sub A