$[$Collimated beam$].$ The beam from a $7$ mWX laser has a cross$-$section area of $\backslash (1\backslash$mathrm$\{$~mm$\}^\{2\}\backslash ).$

$($a$)$ How much one minute?

$($b$)$ How much energy is contained in a $1-$meter long portion of this beam?

$($c$)$ What is the $($average$)$ energy density $($in $\backslash (\backslash$mathrm$\{$J$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash ))$ in this beam?

$($d$)$ What is the intensity $($in $\backslash (\backslash$mathrm$\{$W$\}/\backslash$mathrm$\{$m$\}^\{2\}\backslash ))$ of this beam at a point $1$ meter from the laser?

$($e$)$ What is the amplitude of the magnetic field at this point?

$($f$)$ What is the amplitude of the electric field at this point?

$($g$)$ At one instant, the magnetic field points in the $\backslash (+$y $\backslash )-$direction. If the beam is propagating in the $\backslash (+$x $\backslash )$ direction, what is the direction of the electric field at that point?