The final velocity values or how to get them

Iwill give brainliest if you answer right : )

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?