3. [-11 Points] DETAILS [ Math 110 Course Resources - Curve Sketching Course Packet on intervals of concavity Suppose the second derivative of fis given by f"(x) = 30x7(x 6)5(x2 + 64). Determine the intervals of concavity of f. Enter your answer using interval notation. If an answer does not exist, enter DNE. f is concave up on f is concave down on Submit Answer 4. [11 Points] DETAILS Math 110 Course Resources - Curve Sketching Course Packet on intervals of concavity Suppose the second derivative of fis given by f"(x) = 15(x 3)4(x2 36). Determine the intervals of concavity of f. Enter your answer using interval notation. If an answer does not exist, enter DNE. f is concave up on |:| f is concave down on |:| Submit Answer 5. [-11 Points] l DETAILS l 5. [-/1 Points] DETAILS Math 110 Course Resources - Video Tutorial Given f(4) = 35, f'(4) = -4, and f"(x) = 0 for x 2 4, which one of the following statements about f(7) must be true? O f(7) must be less than 23 O f(7) must be equal to 11 O f(7) must be greater than 19 Of(7) must be equal to 19 O f(7) must be equal to 23 Submit Answer 6. [-/1 Points] DETAILS Math 110 Course Resources - Video Tutorial Given f(4) = 20, f'(4) = 2, and f"(x)