Use the graph of y= f(x), assuming f"(x) 0 if x =f, to answer parts (A) through (F) AY O e (A) Identify intervals on which the graph of f is concave upward. Choose the correct answer below. O A. (a,b);(d,e);(g.h) O B. (a,c); (c.e); (g.h) O C. The graph is never concave upward. O D. (e.g) O E. (a,c); (c,d);(e,g) OF. (a,b); (e.g) O G. (b.c); (c.e);(g,h) OH. (de) (g,h) (B) Identify intervals on which the graph of f is concave downward. Choose the correct answer below