18. Out (a) Use the mid-ordinate rule with 5 strips to estimate the area bounded by the curve y = x + x + 1, the y axis, x axis and the line x=5. (3mks) (b) Estimate the same area using the trapezium rule with 6 ordinates. (c) Calculate the exact area covered by the region (a) above. (d) Find the percentage error in (a) and (b) above.