(a) $ K = \beta_1 + \beta_2 + \beta_3$

(b) $ \frac{1}{K} = \frac{1}{\beta_1} + \frac{1}{\beta_2} + \frac{1}{\beta_3} $

(c) $ log K = log \beta_1 + log \beta_2 + log \beta_3 $

(d) $ \rho_K = log \beta_1 + log \beta_2 + log \beta_3$