Let F be a function of twovariables, defined by F(K,L)=7lnK+8lnL

Let F be a function of two variables, defined by F(K, L) = 7 Ink + 8 In L. (a) Find RLK = F1'(K, L) / F2'(K, L), the marginal rate of substitution of L for K. (b) Find LK = ER, (L/ K), the elasticity of substitution between L and K along a level curve for F. RLK (Simplify your answer.)