Use a change of variables to evaluate the following integral. sec 33w tan 33w dw What is the best choice of u for the change of variables? O A. u = secw O B. u = tan 33w O C. u= sec wtanw OD. U=W O E. u = sec 33w tan 33w OF. u= 33w Find du. du = ( ) dw Rewrite the given integral using this change of variables. sec 33w tan 33w dw = | (D) du Find the indefinite integral. sec 33w tan 33w dw =]Use sigma notation to write the following Riemann sum. Then, evaluate the Riemann sum using formulas for the sums of powers of positive integers or a calculator. The right Riemann sum for f(x) = x + 1 on [0,4] with n = 40. Write the right Riemann sum. Choose the correct answer below. 40 OA. TO * + 1 70 40 1 O B. 70 k + = 1 K = 1 10 Oc. E 70K - 1 40 OD. E 10K - 1 70 The right Riemann sum is (Round to two decimal places as needed.)