Please help me with letter C Please and Thank you :)

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

What is the vertex form of f(x) = x2 + 6x + 3

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules