Make correct statements by filling in the symbols ⊂ or ⊄ in the blank spaces:
(i)    {2, 3, 4} ……. {1, 2, 3, 4, 5,}
(ii)   {a, b, c}……… {b, c, d}
(iii)  {x : x is a student of Class 9 of your school.} ……..{x: x is a student of your school}
(iv)  {x : x is a circle in the plane} ……..{x : x is a circle with radius 1}
(v)   {x : x is a triangle in the plane} ………. { x : x is a rectangle in the plane}
(vi)  {x : x is an equilateral triangle in the plane}……….{ x : x is a triangle in the plane}
(vii) {x : x is an even natural number} ……… {x : x is an integer}