B3 (15 points) Consider the function f(x)=x4 on the interval [0 , 1] . (3) Suppose we divide the interval [0 , 1] into n equal subintervals, and use right-endpoints to construct a Riemann sum for the function f Use the sigma notation to write an expression for this Riemann sum. You do not need to simplify it. Note that your answer should be explicit and depend on 11 only. It should not include symbols such as f, Ax or ck. (b) Is the Riemann sum obtained in part (a) an overestimate or underestimate of the area between the graph of the function and the x-axis for 0 5x 5 1 ? Explain. (Answer the question without calculating the exact area.) (c) The Riemann sum obtained in part (a) can be simplified to the following expression: (n+1)-(2n+1)-(3n2+3n 1) 30114 ' 1 Using this simplified expression, calculate the definite integral [x4 dx. 0 Show your work and do not use antiderivatives or the Fundamental Theorem of Calculus. + Drag and drop an image or PDF file or click to browse