$6.$ A solid body has a hole in the middle with an area A$0$ at an initial temperature. If the

coefficient of linear expansion is $,$ what will be the area, A$,$ of the hole after a change

of temperature, $$T $?$

$($a$)$ A$0$T

$($b$)2$A$0$T

$($c$)3$A$0$T

$($d$)$ $2$A$0$T

$($e$)2$$2$A$0$x$$T