The stress-strain diagram for a steel alloy having an original diameter of 0.5 in. and a g...

The stress-strain diagram for a steel alloy having an original diameter of 0.5 in. and a gauge length of 2 in. is given in the figure. If the specimen is loaded until it is stressed to 90 ksi. determine the approximate amount of | elastic recovery and the increase in the gauge length after it is unloaded.