The Sun began its life as an enormous, spherical cloud of gas. As it formed, it collapsed into its current size, changing its radius but keeping its mass (approximately) the same. Both the initial cloud and the current Sun are rotating. [8 points] a. Derive a formula for ratio of the cloud's period to the Sun's current period (Tum / Ts\"). Your formula might involve the radius of the Sun (RM), radius fo the Cloud (Roland), their mass (M). [5 points] b. The Sun currently has a radius of 6.96 >