Evaluate 2x1dx. (2 points) 2. Solve cos2 2x sin 2xdx. (2 points) 3. Evaluate 4x dx. (2 points) 4. Obtain the area of a plane region of 5 rectangles by using two approximations (the right end point or the left end point) lying between the graph of f(x) = -x +9 and the x-axis between x = 0 and x = 2.5. (2 points) 5. Find the area of the region bounded by the graph of y = X x +4 the x-axis and the line x = 2. (2 points)