Final answer:
The subject of the question is Business and the case study is titled 'Analysis of the Case Study Apple Inc. in 2020' by David B. Yoffie and Daniel Fisher of Harvard Business School.
Step-by-step explanation:
The subject of the question is Business. The case study mentioned in the question is titled 'Analysis of the Case Study Apple Inc. in 2020' by David B. Yoffie and Daniel Fisher of Harvard Business School.