A particle is located at the position vector

r $=(5\mathrm{.}00+7\mathrm{.}00)$ m

and a force exerted on it is given by

F $=(4\mathrm{.}00+3\mathrm{.}00)$ N$.$

$($a$)$

What is the torque acting on the particle about the origin?

$=$

$13$

N $$ m

$($f$)$

Determine the position vector of one such point. $($Give a point on the y$-$axis.$)$

r $=$

m