What is the optimal solution for the following problem?

Maximize $3$x $+15$y

subject to$,$

$2$x $+4$y $<=12$

$5$x $+2$y $<=10$

and x $>=0,$ y $>=0.$

$($x$,$ y$)=(0,0)$

$($x$,$ y$)=(2,0)$

$($x$,$ y$)=(0,3)$

$($x$,$ y$)=(0,2)$

$($x$,$ y$)=(3,0)$