This The demand equation for a certain product is 7p + 4q = 1500, where p is the price per unit in dollars and q is the number of units demanded. (a) Find and interpret g/ 8 (b) Find and interpret - 8 8 bp (a) How is - dp calculated? O A. Use implicit differentiation. Differentiate with respect to p and assume that p is a function of q. O B. Use implicit differentiation. Differentiate with respect to q and assume that p is a function of q. O C. Use implicit differentiation. Differentiate with respect to q and assume that q is a function of p. O D. Use implicit differentiation. Differentiate with respect to p and assume that q is a function of p. Find and interpret - . Select the correct choice below and fill in the answer box to complete your choice. aq O A. dp is the rate of change of demand with respect to price. do aq dq O B. dp is the rate of change of price with respect to demand. (b) How is do calculated? O A. Use implicit differentiation. Differentiate with respect to p and assume that p is a function of q. O B. Use implicit differentiation. Differentiate with respect to q and assume that p is a function of