Question:
Function Terminology of 'Onto' and 'One to One'
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