Find the approximations Tn, Mn, and Sn for n = 6 and 12. Then compute the corresponding errors ET, EM, and ES. (Round your answers to six decimal places. You may wish to use the sum command on a computer algebra system.) 4 9 x dx 1 n Tn Mn Sn 6 18.080692 Correct: Your answer is correct. 17.960146 Correct: Your answer is correct. 18.004219 Correct: Your answer is correct. 12 18.020419 Correct: Your answer is correct. 17.989824 Correct: Your answer is correct. 18.000328 Correct: Your answer is correct. n ET EM ES 6 12 What observations can you make? In particular, what happens to the errors when n is doubled? As n is doubled, ET and EM are decreased by a factor of about , and ES is decreased by a factor of about .