Calculate the force exerted on a rocket at take$-$off, when gases are expelled at a rate of $1300$ kg$/$s with a speed of $4\mathrm{.}5$x$104$ m$/$s

to$.$

$21\mathrm{.}0$x$109$N

b$.$

$32$x$108$N

c$.$

$25$x$107$N

d$.$

$6$x$107$N