4. (2003-85) If a trapezoidal sum overapproximates [f(x) dx, which of the following could be the graph of y = / (x)? (A) (B) (C) (D) (E) 5. (2008BC-8) The function fis continuous on the closed interval [2,13] and has values as shown in the table below. Using the intervals [2.3]. [3.5]. [5.8]. and [8,13]. what is the approximation of [ f(x)dx obtained from a left Riemann sum? X 2 3 5 8 13 f(x) 6 -2 3 9 (A) 6 (B) 14 (C) 28 (D) 32 (E) 50 6. (1998-82) If f(x) = g(x)+7 for 35x5, then ][/(x)+8(x)kx= (A) 2f g(x)dr+7 (B) 2/8(x)ax+14 (C) 2]g(x)ax+28 (D) ]g(x)ax+7 (1) ]g(x)ax+14