5. [8 points] Use logarithmic differentiation to find " where y = (s+1) 1 -25-3 s' + 2r+3 r+2r-3 (A) (B) (C) (D) None of 2(12+3) (x - 1): 2(12 - 3) (r+ 1): 2(1+3) (x+ 1)1 above 6. [6 points total: 3 points each correct, 0 for incorrect answer or no answer Answer "True" or "False" for each of the following: (i) If demand is elastic, then marginal revenue is increasing. (ii) Elasticity of demand is the ratio of the resulting absolute change in quantity demanded to a given absolute change in price