Problem 5 Imagine a situation in which a star that has initially a radius of Ro = 8 x 10*m collapses to become a red dwarf with approximately the same radius as the earth, R. = 6.38 x 10*m. (a) If it was initially rotating around its axis with a period of 2.592 x 10's (approximately 30 days), and if it does not lose any mass in the process, what is its new rotational period? Treat the star as a uniform sphere throughout (moment of inertia ] = MR?). 1 (b) How does your answer change if the star loses 10% of its mass in the process? To be precise, imagine that in the collapse all the mass outside of a radius 0.965Ro is ejected in a violent, radial (why is this important?), outward push, while all the mass inside this radius (which is 9/10 of the original mass, if the density is uniform) collapses as in part (a). (Hint: what fraction of the original angular moment was due to the mass with r