Question 1153905

 In roster form, all the elements of a set are listed, the elements are being separated by commas and are enclosed within braces { }

the set  { {{{x}}} | {{{x}}} element {{{N}}} and {{{7 <= x < 12}}} } in roster format is

 { {{{7}}},{{{8}}}, {{{9}}}, {{{10}}}, {{{11}}}   }