$4(10$ points$)$

A circular current loop lies in the $\backslash ($ x y $\backslash )$ plane. The radius $\backslash ($ a $\backslash )$ of the circular loop is $1$ micron. The current $\backslash ($ I $\backslash )$ on the loop is $1$ Ampere. The loop is in a uniform magnetic field $\backslash (\backslash$vec$\{$B$\}\backslash )$ of $1$ Tesla which makes the angle $\backslash (\backslash$theta $\backslash )$ of $\backslash (45^\{\backslash$circ$\}\backslash )$ with respect to the $\backslash ($ z $\backslash )$ axis as shown in the figure below.

$(1)$ What is the force exerted on the loop by the magnetic field?

$(2)$ What is the torque exerted on the loop by the magnetic field?

No derivation of the formula is needed.