J$.$ For the deformed beam shown below, let $=$ slope of the deflected beam. One can state the following

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

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

$($c$)$ at $x=\frac{L}{2},=$max,$y=$max

$($d$)$ at $x=L,=0,y=0$