Question

A is a set
of
even natural numbers less than 10​

Answer 1

Answer:

a={x:x<10, x€N}. this is the building form

Answer 2

in set builder form

A= {x, where x Ə N and x < 10}

in roaster form

A={1, 2, 3, 4, 5, 6, 7, 8, 9}