During your winter break, you pull a rope attached to the sled with a force of $150$ N at

$25$ above the horizontal. The mass of the sled$-$rope system is $80$ kg$,$ and there is

negligible friction between the sled runners and the ice. $($a$)$ Find the acceleration of the

sled $($b$)$ Find the magnitude of the normal force exerted on the surface by the sled.

$($Multiple Choice Question$)$

a$.0\mathrm{.}85$ m$/$s$2$ and $360$ N b$.1\mathrm{.}7$ m$/$s$2$ and $720$ N c$.2\mathrm{.}1$ m$/$s$2$ and $1043$ N

$]$