Question

Pls answer 4,5 questions

Answer 1

1. {1,2,3}

2.{1,2,3}

3. {4}

Answer 2

Q.4)

X=1,4,9,10,11

Y=6,8,10,11,12,13

X union Y=1,4,6,8,9,10,11,12,13

n(X union Y)=9