Answer:
Students 1 and 2
Step-by-step explanation:
A.

B.

It's a minimum, becuase
.
C.
The axis of symmetry is
. So, in this case, it's
.
Answer:
C
Step-by-step explanation:
There are three turning points.
The local minimums are (-1,-5) and (1, -5)
The local maximum is (0,-4)