Two sets A and B are as under  $A=\{(a,b)\in R\times R:|a-5|<1and|b-5|<1\}$ . $B=\{(a,b)\in R\times R:4{(a-6)}^2+9{(b-5)}^2\le 36\}$Then

set A contains all points inside $\left|x\right|<1,\left|y\right|<1$
set B contains all points inside or on  $\frac{{(x-1)}^2}{9}+\frac{y^2}{4}=1$
$(\pm 1,\pm 1)$  lies inside the ellipse  $\Rightarrow A\subset B$