The following data relates to the marks in subject STATISTICS and MARKETING in a board exam. Measures Statistics Marketing Mean 39.5 47.5 S.D. 10.8 16.8 Correlation coefficient 0.42 a) Fit the two lines of regressions. b) Estimate the marks of a students in Marketing who scored 60 in Statistics. c) Estimate the marks of a students in Statistics who scored 70 in Marketing.