We want to use a Riemann sum with right endpoints to approximate the value of the definite integral Lor sin (27) dz a) If you divide the interval [4,6] into 3 sub-intervals of equal length, you get 3 intervals of the form [x, x+1] whose union is the interval [4,6]. List the endpoints of these intervals from left to right. Don't forget the square brackets and list the elements separated by commas. Answer: [x0,x1,x3] b) Compute the value t; of each term of the Riemann sum with right endpoints and list your results from the interval the most to the left to the interval the most to the right. Write your answers with an accuracy of two decimal places. Don't forget the square brackets and list the elements separated by commas. Answer: t1, t2, t3] = c) Compute the value of the Riemann sum with right endpoints. Write your answer with an accuracy of two decimal places. Answer: -0.40