Use the following R printouts to answer the question. Console Terminal x Jobs x 47 > x mod summary(mod) call: 1m(formula y-x) Residuals: Min 10 Median -128.43 -63.13 24.52 coefficients: 3Q ax 69.32 125.72 Estimate Std. Error t value Pr (>|t|) (Intercept) -12.842 x 36.184 72.143 -0.178 3.693 signif. codes: 0 0.001 0.863 9.798 4.24e-06 *** 0.01 0.05 0.1 1 Residual standard error: 92.19 on 9 degrees of freedom Multiple R-squared: 0.9143, Adjusted R-squared: 0.9048 F-statistic: 96.01 on 1 and 9 DF, p-value: 4.239e-06 An investigation of the relationship between traffic flowx (1000's of cars per 24 hours) and lead content y bark on trees near the highway (/dry wt) yielded the data in the accompanying table. 8.3 12.1 12.1 17.0 17.0 17.0 24.3 24.3 24.3 33.6 x 8.3 227 312 362 521 640 539 728 945 738 759 1263 Summary Statistics are: -11. Ex-198.3. Ex-7034. Ex-4198.03. -5.390.382. x,y,-149,354.4 Based on the given R printouts, find a 95% Confidence Interval of beta (population regression slope). O a. (-36.1, 73.9). O b. (-12.842, 36.184). O c. (27.830, 44.537). O d. (41.632, 49.113).