Answer:
There are many. Two examples are

Step-by-step explanation:
There are many examples. The simplest is
1 -

It is trivial that

2 -

That function is injective as well.

An example of a function that is NOT injective is

Notice that

Answer:
It would be C.
Step-by-step explanation:
This is because they allow it to be 50 dollars and less, making it C.
The answer is 1 / 4
hope this helps (:
I'm pretty sure there where 64 teams in the start of the tournement