Force vec$(F)=(9\mathrm{.}82N)hat(i)-(8\mathrm{.}59N)hat(k)$ acts on a pebble with position vector vec$(r)=(8\mathrm{.}78m)hat(j)-(8\mathrm{.}25m)hat(k),$ relative to the origin. What is the resulting torque acting on the pebble about $($a$)$ the origin and $($b$)$ a point with coordinates $(3\mathrm{.}10m,0,-6\mathrm{.}74m)?$

$($a$)$ Number $$ hat$(i)$ hat$(j)$

$$ widehat$(k)$ Units $$

$($b$)$ Number $$ hat$(i)$

$$ hat$(j)$

$$ widehat$(k)$ Units $$