Answer:
Explanation:
Set is a well defined collection of objects .
We can express set in roaster form or set - builder form
Roaster Form
We express elements within curly brackets using commas between the elements .
Set Builder Form
In set builder form , all the elements of the set possess a common property which is not possess by elements outside the set .
We describe the elements of set using a symbol x which is followed by a colon . After colon , we write property possessed by the element and then enclosed the description within curly brackets .
(a)The set of all humans whose first name is Tanya or Nelson
We need to write this one in set builder form .
Define set as follows : { x ∈ H : H is set of all the humans and x is either Tanya or Nelson }