Why is my answer wrong? Use the slice and variable shown in the figure to write a Riemann sum and then a definite integral representing the volume of the region. Use your work to answer the questions. (a) What is the approximate volume of the slice with respect to \( x \)? Type the word Delta or use the CalcPad when you need \(\Delta \).(b) In your definite integral what is the lower endpoint? In your definite integral what is the upper endpoint? (c) What is the result when you evaluate your definite integral? Give an exact answer. \[\mathrm{cm}^{3}\]