Calculate the angular momentum $($in kg $$ m$2/$s$)$ of Neptune in its orbit around the Sun. $($The mass of Neptune is $1\mathrm{.}0201026$ kg$,$ the orbital radius is $4\mathrm{.}497109$ km and the orbital period is $165$ y$.)$

kg $$ m$2/$s

$($b$)$

Compare this angular momentum with the angular momentum of Neptune on its axis. $($The radius of Neptune is $2\mathrm{.}476104$ km and the rotation period is $16\mathrm{.}11$ h$.)$

LorbitalLrotation

$=$

F$4=3\mathrm{.}2$ N$.$

$($Indicate the direction with the sign of your answer.$)$