3a. Approximate using Trapezoidal Rule using n = 4 subintervals. (Set up only) (8 pts) 3 x + Inx dx b. Find a bound for the largest possible error for the approximation in part (a) (8 pts) (Use whichever of the given derivatives you need to help you) f' (x) = 1-x-2Inx f" (x ) = 2x+6In x- x4 fill ( x ) = 26-6x-24In fill ( x ) = 24x+120Inx-154