2.1 The gure below shows the graph of y = x2 + 1. Calculate the area of the shaded region. (2) 2.2 Determine the volume of the solid obtained by rotating the region enclosed by y = 1/5 and y = Eabout the y axis as seen in the diagram below (5) 2.3 Use the trapezoidal rule to approximate the value of [12 Wm: for n = 4. (4)