Find the trapezoidal Riemann sum approximation of ( vx2 + 3dx using four equal partitions. Of (2 ) + f (6 ) + (0.5 ) [f (3 ) + f ( 4 ) + f ( 5 ) ] Of(2 ) + f (3 ) + f (4 ) + f (5 ) + f (6 ) O (0.5) [f(2) + f(6)1 + f(3) + f(4) + 1(5) O (0.5) [f(2) + f(3) + f(4 ) + f (5 ) + f(6)]