MATH 1426 Exam #2- 18. The second derivative of a function f is f" (x) = 6x3(x2 -2). Determine the interval(s) where the function f is concave up. [A] (-00, 0), (0, 00) [B] ( 0, VZ), (0, V2) ( VZ, 0), (VZ,0.) [D] (0, VZ), (V2, 00) [E] (-00, 00) 19. The functions f, g, and h are all continuous on the interval [a, b]. The table gives the sign of each function and its derivatives for the interval [a, b]. Use the table to match each function with its graph. f (x) >0 g ( x) > 0 h(x) >0 "' ( ) > 0 g' (x) > 0 h'(x ) 0 g"(x) 0 [A] f is I, g is II, h is III [B] f is ll, g is I, his III [C] f is ll, g is Ill, his I [D] f is I, g is III, his II [E] f is III, g is ll, h is