32. For 1990, let dar be a firm's debt to capital ratio, let eps denote the earnings per share, let (log)mefine denote net income, and let (log)salary denote total compensation for the CEO. (i) Using the data in RETURN.RAW, the following equation was esti- mated: return - 40.44 + .952 dkr + 472 eps - 025 netinc + .003 salary (29.30) (.854) (.332) (.020) (.009) 1 = 142, R-= .0285. Test whether the explanatory variables are jointly significant at the 5% level. Is any explanatory variable individually significant