Bradley, M., Jarrell, G. A., & Kim, E. H. (1984). On the existence of an optimal capital structure: Theory and evidence. The Journal of Finance, 39(3), 857-878. Answer the following questions: 5) Statistical Analysis: Interpret the parameters estimated using all firms sample in table three. Are the coefficients statistically significant?) 6) Conclusion: What is the conclusion of the article? (1 mark)