Can you help me answer the following questions within part b & c please?

The magnitude M of a star is a measure of how bright a star appears to the human eye. It is defined by M = -2.5 log( Bo where B is the actual brightness of the star and Bo is a constant. (a) Expand the right-hand side of the equation. M= -2.5 log B + 2.5 log Bo (b) Use part (a) to show that the brighter a star, the less its magnitude. Suppose Bj and By are the brightness of two stars such that Bj