Answer True or False to the following:

1. {1, 2, 3} = {1, 3, 2}
   
   
2. {a, b, a, a} = {b, a}
   
   
3. a  {a}
   
   
4. {a}  {{a}, {b}}
   
   
5. b  {a, {b}, c}
   
   
6. {a, {b}}{a, {b}, c}
   
   
7. {x  R | -2 < x < 1} = {-2, -1, 0}
   
   
8. {x  Z⁺ | -4 < 2x < 6} = {-1, 0, 1, 2, 3}
   
   
9.  = {0}
   
   
10. {x  Z | x²}  R⁺