2. [4 points] To find y' for the implicitly defined function x" = yo, which of the following approaches is the most appropriate? (A) Use power rule on both side to implicitly differentiate the function. (B) Apply a logarithmic function on both side first, then use implicit differentiation. (C) Use differentiation of exponential functions on both side, then use chain rule. (D) This function is not differentiable. Thus, there exist no y'.. . . Ii 1 3. [4 points] In our textbook, 1t1s shown that E; = p(1 + E), where r, q, pg] stands for revenue, quantity, price, point elasticity of demand respectively. If demand is unit elastic in this case, and price is held constant, then what conclusion can be drawn in terms of revenue at q? (A) The instantaneous rate of change of revenue is 2p. (B) The instantaneous rate of change of revenue is D. (C) The instantaneous rate of change of revenue is either 2p or D. (D) The revenue in this case is the same value as the prot because unit elasticity implies that revenue equals cost