Based on recent published accounting and finance studies below: a. Hopkins et al. (2014) find that the ascension of lawyers to top management is associated with higher earning management, which ultimately reduces the shareholders' belief in the company. b. Dole et al. (2019) argue that the economic uncertainty condition aggravates the ability of analysts to accurately predict the company's future earnings. c. Fiordelisi and Ricci (2014) state that firms with aggressive corporate culture are associated with higher CEO turnover due to high expectation from the Board of Directors and majority shareholders. REQUIRED: Explain whether the studies above indicate a systematic or unsystematic risk of investing? Can those situations above be diversified and/or managed? Explain.