1. The problem statement, all variables and given/known data f: B => C and g: A => B 1. If f of g is injective, then f is injective. 2. If f of g is injective, then g is injective. 2. Relevant equations 3. The attempt at a solution I know that 1 is true and 2 is false because I found those as properties, but I am not exactly sure why, and I do not know how to show a proof. Any help please?