D Question 7 2 pts (This problem will have different numbers if you re-take quiz.) Starting with x 0 at the left wall. Assume we measure the displacement at x-85 mm to be 0.82 mm and the displacement at x 215 mm to be 0.9 mm. Determine the average engineering strain in this section as a percentage. Put in answer with three decimal places. For example you might enter 1.142 or -0.005 as the average strain