96.6 176 263 350 569 833 153 198 270 320 355 410 460 x 103 N/m | 87.8 & X 10 m/m PROBLEMS MOHTAROSTI (a) Calculate the derivative do/de using finite differences that are second-order accurate. Plot the data and eliminate the data points near the zero points that appear not to follow the straight- line relationship. The error in these data comes from the inabil- ity of the instrumentation to read the small values in this region. Perform a regression analysis of the remaining data points to determine the values of E, and a. Plot the stress versus strain data points along with the analytic curve expressed by the first equation. This will indicate how well the analytic curve matches these data.sald (b) Often the previous analysis does not work well because the value of E, is difficult to evaluate. To solve this problem, E, is not used. A data point is selected (, ) that is in the middle of the range used for the regression analysis. These values are substituted into the first equation, and a value for Eo/a is d