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Question 3 (1 point) To approximate S (x - 6) dxu dx using Riemann sum, the partition of 4 subintervals each length 2 are: O a) [1,3], [4,6], [7,9], [9,11] O b) [2,4], [4,6], [6,8], [8,10] O c) [2,4], [5,7],[8,10], [11,13] O d) [1,3], [3,5], [5,7], [7,9] O e) None of the above