How do I solve this problem? In this problem, you will write a Riemann sum and then a definite integral representing the area of the entire region. Use the strip and variable shown in the figure to answer the questions. (a) What is the approximate area of the strip with respect to \( b \)? Note - that is a lower case \( b \) You can type the word Delta or use the CalcPad when you need \(\Delta \).(b) What value of \( b \) corresponds to the leftmost end of the region. ---Select What value of \( b \) corresponds to the rightmost end of the region. (c) Set up the definite integral needed to find the entire area of the region. \[\int \]