The questions are in the photos below. I would like them all solved correctly.

Question 5 Give the equation of a quadratic polynomial f (x) such that the graph y = f(x) has a horizontal tangent at x = 4 and a y- Not yet intercept of 1. answered Marked out of f ( x ) = 1.00 Flag questionQuestion 7 Not yet answered Marked out of 1.00 F Flag question Find the coordinates of the point of inflection of: f(x) =x3 3x2 +3x+3. (my) = ([:],[:])