The marginal utility curve can much loosely be translated into the demand curve by: (1) Measuring its declining part in dollars. (2) Transforming utils into the prices. (3) Horizontally summing up everyone’s MUs at each and every price. (4) Setting MUa/Pa = MUb/Pb = ...= MUz/Pz.
Can someone please help me in finding out the accurate answer from the above options.