3. (15%) The table below shows us the results of total marginal benefits from different combination of program selection. If only $500,000 budget available for the public health services, by using marginal analysis, see the table below for information. Project A Project B Project C Project D Project E Cost Total Benefit Total Benefit Total Benefit Total Benefit Total Benefit 100,000 $315 $245 $330 $275 $280 100,000 540 485 595 530 430 100,000 620 640 680 590 510 100,000 680 710 725 640 575 100,000 730 750 760 685 620 A) What will be the best choice of program combination to be selected? (5%) Please explain your steps and numbers. B) What is the final total benefits from this optimal combination (Summation of the five times of marginal benefits)? (5%) Show your calculation and