If f is an onto function from X to Y and g is an onto function from Y to Z, you prove that g ∘ f is onto by supposing that ______and then showing that__

To fill:

If f is an onto function from X to Y and g is an onto function from Y to Z, you prove that g∘f is onto by supposing that _____ and then showing that _____.

Given information:

The given statement is,

“If f is an onto function from X to Y and g is an onto function from Y to Z, you prove that g∘f is onto by supposing that _____ and then showing that _____”.

Since, f:X→Y such that

f(x)=y

And

g:Y→Z such that

g(y)=z

Then

(g∘