Answer:
b. $28,000 and $12,000 respectively
Explanation:
The marginal cost and marginal revenue refers to the additional cost or revenue that is generated for adding an additional unit or increasing the ouput by one unit,
In thi case, moving to Large reservoir from Medium reservoir
Marginal cost: 72,000 - 44,000 = 28,000
<em>It cost 28,000 to move to a large reservoir</em>
Marginal revenue :64,000 - 52,000 = 12,000
<em>It generates additional benefit for 12,000</em>