Certain application requires plates (1) and (2) to be attached to each other using glue, as indicated below. During fabrication plate (1) was made M = 3 mm smaller than needed. Plate (1) was placed in an oven to increase its length so that it would perfectly match the size of plate (2). The plates were then immediately glued together. Plate (1) has stiffness k = 37 103 N/mm, plate (2) has stiffness k = 18 103 N/mm and L = 24 10 mm. (1) (2) L Increase temperature plate (1) Return plate (1) to original temperature 6 Plates are glued together L' Determine the extensional strain of plate (1) after plate (1) returns to its original temperature.