I have to do this question for my final, a clear format to remember what to do would be greatly appreciated!

Planets form out of so$-$called circumstellar disks surrounding a protostar. Over time,

the material within a particular region of space around the star will come together under its own

gravity to form a planet. The planet Jupiter formed out of a region of the circumstellar disk from R$1=$

$4\mathrm{.}0$ AU to R$2=8\mathrm{.}0$ AU containing all of Jupiter$$s present mass. Today, Jupiter has a mass of

$1\mathrm{.}901027$ kg and a radius of $70,000$ km and orbits the Sun at a distance of $5\mathrm{.}2$ AU$.$ Assume the

circumstellar disk and Jupiter all orbit the Sun at the same rate $($one orbit every $11$ years$).$

A$.[6$ pts$]$ What was the initial angular momentum of the region of the circumstellar disk that

became Jupiter?

B$.[5$ pts$]$ How much angular momentum does Jupiter have now as a result of just its orbit around

the Sun?

C$.[7$ pts$]$ If Jupiter lost no angular momentum between when the gas was part of the disk and when

it became a planet, what should Jupiter$$s rotational angular velocity $($spinning on its axis$)$ be today?