Work on the capacity requirements problem: an assembly line comprises of three machines that work in a sequence as the diagram below:

The demand for the products produced by this assembly line over four years: Year 1: 400 units, Year 2: 600 units, Year 3: 850 units, and Year 4: 1,150 units.

Each process comprises of several machines which run in parallel. Each of the machines for Process 1 has a capacity of 250 units / year, each machine for Process 2 has a capacity of 200 units / year, and each machine for Process 3 has a capacity of 250 units / year.

Below is the production capacity plan (which is the answer to the question), how to get all of this number in this answer, please show the formula and logic behind the steps.

Question 2 Plan A Plan B Which one is better? Why