Make correct statement by filling in the symbols of subset or not subset in the blank space:

(1) {2,3,4}......{1,2,3,4,5}
(2) {a,b,c}.......{b,c,d}
(3) {x: x is a student of class 11th of your school}.........{x: x student of your school}
(4) {x: x is a circle in the plane}.........{x: x is a circle in the same plane with radius 1 unit}
(5) {x: x is a triangle in a plane}.......{x: x is a rectangle in the plane}
(6) {x: x is an equilateral triangle in a plane}..........{x: x is a triangle in the same plane}
(7) {x: x is an even natural number}...........{x: x is an integer}