Assignment:
Assume f: A->B and g: B->C.
a) Show that if f and g are both onto, then g o f is onto.
b) Show that if g o f is one-to-one, then f is one-to-one.
c) Show that if g o f is onto and g is one-to-one, then f is onto.
Provide complete and step by step solution for the question and show calculations and use formulas.