The data below represent the results of a test for the strength of an asphalt concrete mix. The test consisted of applying a compressive force on the top of different sample specimens. Two responses occurred: the stress and strain at which a sample specimens failed. The factors relate to mixture proportions, rates of speed at which the force temperature. Higher values of the response variables indicate stronger materials. The variables are: XI: percent binder (the amount of asphalt in the mixture). X2: loading rate (the speed at which the force was applied). X3: ambient temperature. YI: the stress at which the sample specimen failed, and Y2: the strain at which the specimen failed. Perform separate regressions to relate stress and strain to the factors of the experiment. Check the residuals for possible specification errors. Calculate and plot the residuals (errors) against the fitted values. Normal-probability plot. Interpret all results The data below represent the results of a test for the strength of an asphalt concrete mix. The test consisted of applying a compressive force on the top of different sample specimens. Two responses occurred: the stress and strain at which a sample specimens failed. The factors relate to mixture proportions, rates of speed at which the force temperature. Higher values of the response variables indicate stronger materials. The variables are: XI: percent binder (the amount of asphalt in the mixture). X2: loading rate (the speed at which the force was applied). X3: ambient temperature. YI: the stress at which the sample specimen failed, and Y2: the strain at which the specimen failed. Perform separate regressions to relate stress and strain to the factors of the experiment. Check the residuals for possible specification errors. Calculate and plot the residuals (errors) against the fitted values. Normal-probability plot. Interpret all results