Let fi = f(a;), f = f'(a;), fl = f"(x;) and so on, where a ; are equispaced grid points with spacing h = ;+1-j. Applying Taylor's theorem about the point ; , f j - 2 = f j t afj + bf " + cf!" + af (iv)(t), where a X b = 2 X C = 3 X d = 4 X PSuppose you are going to estimate 9 I/ cosZmdm. 0 using the trapezoidal rule. According to the error bound, what is the minimum number of points we needed to guarantee that the absolute value of the min error is less than 10*6