Find the union of each of the following pairs of sets:
i) X={1,3,5} Y={1,2,3}
ii) A={a, e, i, o, u}, B={a, b, c}
'iii) A={x: x is-a natural number and multiple of 3}
B={x: x is a natural number less than 6}
iv) 'A={x: x is a natural number and '1 < x ≤ 6}
B={x: x is a natural number and '6 < x < 10}'
v) 'A={1, 2,3}, B=`{phi}`