hello 3 calculus thanks

Question 1 If f" (c) = 0, then the concavity of f changes at C. O an inflection point occurs at i = c. O f (c) is a local maximum. f (c) is a local minimum. O C is a candidate for the location of an inflection point. Question 2 Suppose that f" exists on an interval I, and f" (x) 0 on I. f is concave up on I. of (x)